Okanagan School of Natural Hoof Care
  • Home
  • About
    • Meet the Herd
    • Barefoot Performance Horsemanship Lessons and Training
    • Barefoot Performance Horsemanship Youth Leadership Program
  • Online Learning
    • OKSNHC Virtual Facebook Classroom
    • Online Hoof Anatomy, Theory and Barefoot Trimming Course
    • Laminitis and Founder Online Course
    • Glue-on Composite Shoe Online Course
    • Virtual Coaching and Online Consults >
      • How to take and organize hoof photos for consults
    • Reviews and Testimonials for Online Courses
  • Hands On Training
    • 5 Day Trimming Course
    • 4 Day Private Trimming Course
    • Weekend Workshops
    • Host a Clinic
    • Reviews and Testimonials
  • Online Course Login
  • Blog
  • Contact
  • Store

Foundered Case Study with PPID and IR Complications

2/16/2022

1 Comment

 
Picture
This the front right hoof from the medial side

​I had spoken on the phone to the owner of this horse prior to arriving and I was prepared to deal with a foundered horse, but I wasn't aware of the severity.

This horse has been under veterinary care and was seen by the farrier every 4 weeks for the last few months. There are also underlying PPID and IR issues.
This horse has been very lame for the last year. 
Picture
front left hoof
Picture
front right hoof

​The only radiographs I had to work with were from 6 months previous. They show significant sinking and rotation, but I suspect the damage is even worse judging by the current state of the hooves. Current radiographs would be extremely helpful, but in this case they are not available.
While this trim seems fairly drastic, I am sure I could have done more if I had current x-rays. This was a step in the right direction to restore function and set up the new growth for coming in. The owner purchased Easyboot Clouds to keep this horse comfortable moving forward and we plan to trim every 3 weeks to start.

In the pictures above you can see the huge lamellar wedge. There is so much separation in this hoof wall. I also tried not to touch the sole at all, what I did trim on the bottom was the overlaid bars and overgrown frog. I also tried to lower the heels to realign the bottom of the coffin bone. This horse has very thick bone, and will naturally have a slightly longer heel then the average 1.25 inches because of that.

From a metabolic standpoint this horse is on low sugar hay in slow feed nets placed around her paddock to increase movement, I also suggested adding biotin to her diet to help with hoof growth, and rechecking her ACTH levels to make sure her Pergolide dosage for her PPID is effective.

​I will update this case study with more picutres next time I see her.


​March 1 2022 Trim and update

Since the last trim the owner reports that she is moving better, though still sore. She wears the Easyboot Clouds 24/7 right now. This trim I really worked on bringing the heels down a bit more and removing some more of the large wedge from the top. Because the heels were so overgrown the frog was also overgrown, but at the first trim it was very hard and I didn’t want to remove too much. This trim the frogs were very crumbly and I trimmed them down until all the rotten material was gone. I didn’t trim any sole, but I did trim down some overlaid bar off the sole. The bar was also quite crumbly. This is still a huge work in progress and I will see her again in another three weeks and reassess.
​
Picture
1 Comment

Contracted Tendons, Club foot, Crenas Oh my!

2/6/2022

0 Comments

 
Picture
I got a lot of interesting comments when I posted this picture on social media the other day. I thought I would take a minute to explain this horse's situation and how I handle it.

This horse has bi-lateral contracted tendons, which means both DDFT's on his front legs are short, and also has a club foot on his front right, and a suspensory injury on that front right. This poor horse just has the deck stacked against him.

Dealing with the contracted tendons is tricky. It's important to perform the "stretch test" to determine his ability to extend the DDFT's before deciding how much to lower his heels. The stretch test is when I extend his leg forward and straighten the the knee, and then fully extend the fetlock and pastern. Through this we can measure the horse's range of motion and comfort level. It's important to do this a couple of times and form an assessment based on multiple attempts. Assuming he has a good range of motion and can extend the leg I can then decide to lower the heels based on his extension capabilities. I also use this stretch to help determine heel height on club hooves.
Picture
Performaing the stretch test, in this case we could straighten the knee and extend the fetlock. The last step is to fully extend the pastern but tipping the toe up toward the sky. I do this very gently, allowing the horse to pull away at any moment if the stretch become too much.

This is just one thought process I use when determining heel height, I also need to assess the hoof itself, including the pastern angle and the frog health, sole depth etc.

From the bottom of the hoof I want the heels to ideally be in line with the collateral groove exits, the frog height and sitting just a little bit above sole level.

This horse grows hardly any toe, and due to the contracted tendons and club foot the dorsal angle of the coffin bone is quite steep. This leads me to suspect possible coffin bone rim edge damage, due to the fact the coffin bone is perpetually on it's tip. He also has a small crena in the sole at the toe further leading me to this conclusion. A crena is a little dip in the sole, caused by a missing piece of coffin bone, which in turn means there is a missing piece of the solar corium that grows the sole. This results in a tiny divot in the sole, usually right where the tip of the coffin bone would be. 
Picture
You can see here the slight divot in the center at the toe immediately behind the golden line. The golden line dips down and in this picture there is a bit of dirt stuck into the recessed golden line.

So what's my plan? Generally speaking he has good flexibility in the leg so I can lower the heels about a 1/4 inch at each trim. This leaves them sitting about a 1/4 inch above the height of the sole. In a perfect world I'd like to trim him every two weeks and lower them and 1/8 of an inch at a time instead. I rarely trim the toe other then applying a bevel from the golden line outward, and I usually have a bit of frog to trim and clean up. Thankfully he grows very nice upright and manageable bar so trimming it is easy. I just ramp it down from the heel following the natural concavity of the hoof.


I usually apply a bevel to the heels anytime I have to leave them higher then I would like to. This can also be called a "rocker". ​
Picture
A "rocker" allows the heel to float just a tiny bit off the ground while the rest of the hoof is weighted.

With a rocker applied, during motion the horse must extend his stride and flex the tendon just a little bit more in order to land heel first. You must be very careful with this that you don't ask them to extend any farther then they can comfortably handle. If you trim your heels too low or apply too much rocker you could cause them to land toe first to alleviate the discomfort, and/or risk injury. My aim to to ask for an 1/8 of an inch, and over time keep bringing that heel down until it is at a normal level. This of course is the plan, but it is sometimes a work in progress throughout the entire lifespan of the horse. 

Adding to this complicated case is the suspensory injury this horse has. He has an old fractured split bone and as the lower branch of the medial suspensory ligament  moves across it becomes torn and jagged. This has lead to an abundance of scar tissue forming, creating less flexibly and range of motion and frequent bouts of lameness as the inflammation flares up. This pertains to my job aligning the hoof as I don't want to further aggravate the injury, so I am forced to trim very conservatively until the owner and vet decide on a course of action for this reoccurring issue.
​
Picture
Picture
Picture
Picture
Picture
0 Comments

Rehab of a foundered lesson horse - Odin's Case Study

5/28/2021

0 Comments

 

April 13 2021

The pics below are from Odin's initial shoe pull and trim. We applied composite shoes to his fronts to provide artificial concavity due to his flat soles. You can see the long leveraging toe, flat sole and low, crushed heels.

I opted to set the breakover far back under the composite shoe in order to reduce the leverage on the new growth just below and coronary band.


​May 18 2021

Today I pulled the composite shoes and after the trim applied Glue on Easyshoe Performance shoes.
The focus was on bringing the toes back to relieve the leverage on the hoof wall as well as to allow the heels to come in at a steeper angle in order to bring the weight bearing surface back underneath the horse.
Read through the comments on the individual pictures for a more in-depth explanation.



​Jan 30 2022

A bit of time has passed since Odin's last update. He recently became one of our school horses so that I can give him the routine care that I think he needs. Odin presents as quite stiff and sore and very reluctant to move forward. I think he has a few combined issues and I hopeful we can help him to improve and maybe one day use him in our Youth Program. Along with his under run heels, Odin has long stretched forward toes and thin soles. He was also diagnosed with kissing spine before he came here. 

​Today I applied EasyShoe Performance NG's with 11 finger tabs, Duplo wedges, DIM for support and Artimud to combat moisture. 

Before Trim Video

After Trim Video


​Below are the modified composites I applied. I favor the EasyShoe Performance NG's and Easyshoe Versa Grip Lights. You can use plastic wedges as well, or even build up a wedge with glue but I prefer the simplicity of the Duplo Wedges. I love how versatile these composite shoes are with the 11 finger tabs. This pics below show the shoes before I welded more tabs on. These shoes have been used a few times and you can see they still have a lot of life left to be used again. This is one of my favorite things about the 11 finger tabs, they can be ground off and new one welded on once they get too thin or lose their shape.
Picture
Picture
Picture
Picture
Picture
Picture
Picture
0 Comments

Foundered Cadaver VLOG

3/22/2021

0 Comments

 
This hoof belonged to Ruby, one of our rescue ponies. She was chronically foundered and suffered from untreated PPID before we got her. We tried for three years to help her but ultimately when the bad days started to outnumber the good ones we had to end her suffering.

When Ruby first arrived she was emaciated and had very long overgrown, foundered hooves. But she was the kind of pony who always looked at you with appreciation in her eyes. We had her examined by our Vet right away and he floated her teeth, ran bloodwork and got her started on medication for the PPID. During the next three years she was off an on again sound, and had frequent bouts of laminitis. 
Picture
0 Comments

Montana - Founder Case Study

2/25/2021

0 Comments

 
Montana is a paint mare that presented with a disconnected hoof wall, and both rotation and sinking of the coffin bone. She has an extremely flared hoof capsule and a very flat sole with zero concavity. Her owner repots that she is tender when ridden barefoot and "requires shoes or boots" when ridden to keep her sound.


​January 27 2021

​I opted for a conservative trim, steeply beveling the toe to reduce leverage, but leaving excess heel and quarters in order to provide some "false concavity".

On the bottom view you can see the bruising on the sole directly under the coffin bone from the lack of concavity and too much solar pressure. She has boots and pads to keep her comfortable for now and we will likely move to composite shoes for riding season in order to give her some long term comfort and “false concavity” to relieve that solar pressure.
​
You can see the huge abscess she blew along the heel bulbs and frog as well. I wouldn’t be surprised if that starts to separate as it grows out.


Feb 24 2021

Her owner reports that she has been moving really well and only required boots for a few days after the last trim and when riding. 

This trim was similar to the previous one in that I steeply beveled the toe to reduce leverage, though this time I did not leave excess heel and quarter height. The heels were starting to fold over and quarter was breaking away. 

You can see the connected hoof wall growth coming down farther from the coronary band as well. Overall I am very pleased with her progress thus far.
Picture
You can see the connected new growth coming down much farther in the Feb 24 picture. The heel is also moving back, shifting the weight bearing surface farther underneath the hoof towards a more correct position. This also alters the angle of the pastern to be more upright and closer to "correct".


​March 26 Trim

I am happy with the progress so far, the hoof wall connection is coming in and Montana has been moving well. The key here is keeping the leverage back so that it doesn't undermine the connection up higher. 


April 15 Trim

This trim was a couple of weeks early but because I was in her area with my students during the 6 day course I thought we would touch up her trim and use her as a case study to teach the students. Montana is still very comfortable and the connection is coming down the hoof wall. Her owner is still using boots for riding and is very pleased with her progress.


May 14 2021

I got a call from Montana's owner that about 3 weeks post trim she came up lame that morning. We suspected abscessing and the owner soaked daily for about a week. Nothing presented but Montana came in and out of soundness during that time. When I arrived I could not see any sign of an abscess, and noticed that she was very tender in all 4 feet and having trouble walking on the gravel driveway. We concluded that possibly due to the recent rainfall (it had been a previously very dry period) and the wet ground perhaps the moisture had softened Montana's thin soles and we opted to apply Easyshoe Versa composite shoes to her fronts. The owner reported about three days later that Montana was very sound and she was able to ride her. 

My goal will still be to grow in healthy wall connection and allow the sole to thicken. We will likely keep using the composite shoes for the summer riding season with the hope that in the fall she will be able to transition back to barefoot and then hopefully next spring not require the use of composite shoes.
Picture
0 Comments

Flash - Navicular Rehab Case Study

2/23/2021

0 Comments

 
I purchased Flash in August of 2020 to be one of our school horses used during our trimming courses and because he had been diagnosed with Navicular Syndrome by the previous owner's Vet and I wanted to both help improve his condition and study him.

I am somewhat skeptical of the diagnosis as it was made without radiographs to confirm, and was only based on the Vet's opinion of how he was moving at the time. If you look at his initial photos and hoof conformation I struggle to understand how a diagnosis could have been made solely by assessing his movement with his hooves in that condition.

Either way I am moving forward under the assumption he may have Navicular Syndrome and treating him as I would treat any horse; with proper frequent trims, a good diet and turnout 24/7 on my track with my herd. 

August 25 Initial Set Up Trim 


​The following video is from Aug 25 2020 and was taken immediately before pulling the shoes and trimming.

Though it's not the best video to showcase his movement, you can see that he us kicking forward sand with his front hooves. This is due to toe first landings.


​August 27 2020, 2 days after trim with Easyboot Cloud boots.

He is still pretty stiff through the body, and if landing flat, avoiding using his heels.


​The following pictures are from September 7 2020


​September 7 2020, Easyshoe Performance Glue Ons


​September 7 2021, Easyshoe Performance Glue Ons


​November 20, 2020, Trim and cast with Easyshoe Flex Lights


​February 22, 2021 Trim


​February 22 2021, After trim, barefoot.

This is by far the best I have seen him moving. Still landing flat and with hesitation, but overall significantly improved from before. 


March 25 before and after trim pics

After this trim Flash was sounder then he has been since he arrived. I have also noticed a huge change in his behavior over the last month. He has finally settled into the herd and has started to approach me and ask for attention. Something he was never interested in before. After this trim I even rode him lightly in the arena for a few minutes, this was his first ride since we brought him home, and probably his first ride in over a year. 

I would still like to see him grow in more hoof wall connection as well as stronger digital cushions. As he grows in more wall connection I also expect that his concavity will increase and his soles will thicken, resulting in less bruising. 


April 19 Trim and Composite Application

Flash has been doing well, he has gone from unsound to sound on the track where he lives and sound in the sand arena. Because of his progress we have started riding him and I have found he is tender on rocks and hard surfaces. I wanted to try a composite application to see if we can build more sole thickness and continue to ride him. I glued on Easyshoe Performance Shoes, with a soft sole packing underneath and topped the application off with a thin layer of 3M casting. 

​The following video was from immediately after the composite application
The following video was from later in the evening on the same day of composite application

December 2021 Update

Watching Flash improve has been very emotional. He has gone from a very shut down horse to an in your pocket and really friendly guy. He is a favorite among the youth that I work with and has been sound enough to use in the program since the August 2021. He spend most of the summer in Easyshoe Versa Grip Lights glued on with the 11 finger tab system. This product packed with dental impression material both protected and stimulated the back of his hooves and caused his frog to grow in wider and thicker, as a result of the improving health of the digital cushion. 

Even though I was watching his soundness and comfort improve I was feeling a bit discouraged with the progress of his hooves until I put these pictures from the beginning of his journey along side the current hoof pictures. I can see that the overall angle of the hooves has changed dramatically and the heel is much farther back underneath the hoof. Also the entire back of the hoof has changed. The frog is wider, but the heel bulbs are also wider and more "full", with a much stronger digital cushion under there. 

While there is still improvement to be made I am much happier with Flash's progress having looked at how far he's come. 
Picture
0 Comments

Dixie - Rehab of a serious hoof crack

1/26/2021

2 Comments

 
Picture
Dixie is an 11 year QH mare, who has suffered with this toe crack for several years. Her current owner purchased her in the spring of 2000 and had been working with a vet and corrective farrier for 8 months without significant progress. She decided to try a different approach and brought her here to OKSNHC for rehab in January 2021.

The album below shows the before photos and first trim results. There are captions on some photos to explain important points.
​

January 23 2021


​I will update this blog as we progress. Currently I have applied a trim, and opted to cast her hooves and nail on composite shoes over the casts. I chose this approach to give her stability in the hoof capsule via the casting and to create "artificial concavity" with the composite shoe (Easyshoe Flex Light) to help unload the coffin bone from ground pressure due to a lack of hoof wall connection and a sunken coffin bone.
​

February 8 2021 

My plan this trim was to further reduce the long toe and just see how the new growth is coming in. It has only been a couple of weeks since the last trim so not a ton of new growth, but overall I am happy with the progress. Today I opted to cast only and when these wear off in 1-2 weeks I will soak again to treat that crack for fungus and bacteria and likely apply casting and composite shoes again, though she seemed just as comfortable in the casting alone without the composites. 
​

March 2 2021

This was the first trim that I was able to lower the heels and quarters to a normal level as I planned to apply composite shoes to create the "artificial concavity" that I have been achieving by leaving them high. Her sole is still very flat, though there is concavity starting to form. The crack on the FR is also starting to grow down from the coronary band closed. This is extremely exciting as this mare has had this crack for 5 years! Overall, there is about an 3/4 of an inch of tighter new growth at the coronary band since I began to trim her on  January 23 2021. I applied composite shoes, packed with Artimud, and plan to leave them on until early April. She was off at the trot before the trim and slightly worse after after. I believe this is due both the shorter trim to accommodate the composites, and to corium inflammation due to the flat sole.  In a few days I will take more video to see if  the inflammation has subsided with the composites applied.

Mar 2 before trim

Mar 2 after trim and composites applied

Picture
A comparison from Jan 23 (top) to Mar 2 (bottom).


​Mar 5 2021


​April 9 2021 Video Update


​April 13 2021 Trim

Picture
Picture


April 28 Trim and Composite Application

Overall Dixie has been doing well, but I felt like there was too much pressure on the crack, causing it to continue up into the new growth, just superficially, I trimmed her toe back and for the first time was able to remove the excess heel and quarter that I had been leaving to give her artificial concavity. I applied a glue on Easyshoe Performance, and wrapped in 1/2 a roll of 3M casting to further secure the glue. I also packed the Easyshoe with a soft sole packing. She is moving very sound in this set up. You can see on the glue application that I set the shoe right back to where I wanted her breakover to be. This is extremely important in reducing the leverage on the toe crack. If the shoe is set too far forward as seen in the picture above, the leverage on the crack would be increased causing it to continue to split. 


​June 15 2021

Picture


​August 9 2021 The end of Dixie's Rehab!

Picture
Jan 23 2021
Picture
Aug 9 2021

It's  a bittersweet moment for us here at OKSNHC as Dixie gets ready to go home! Just over 6 months have passed, and Dixie has grown in almost an entirely new hoof! The crack is almost grown out, likely just one more trim will see that through. Dixie's home is about 2.5 hours from me, so one of my students will now be taking over her care along side her owner.

The small vertical crack you can see just above the trimmed area is superficial and will also grow out within the next couple of trims. Over the next 6 months, with proper trimming I expect Dixie to be able to grow in an even better connected hoof wall. You can see the marker lines I drew in the after trim pic showing the various levels of wall angle deviation. These angles are based on hoof leverage and reducing this leverage was my entire goal during this rehab resulting in being bale to grow out the crack.

For over 5 years Dixie suffered with that crack, being worked on by some very experienced and knowledgeable farriers. Clearly from the before picture you can see that they tried everything they knew. Shoes to hold the crack together, glue to help keep it together... I have always and will always maintain, it's not a shod vs barefoot debate, its the trim under the shoe or without the shoe that counts.

Throughout the rehab Dixie had highs and lows. There were some moments she required a composite shoe or hoof cast to be comfortable, and now 6 months later she is sound barefoot. Her transition is not entirely complete, she will require hoof boots for trail riding on rocky ground until she can build more callous and get used to the terrain, but in the paddock, pasture and arena she is 100% sound barefoot. 

Picture
2 Comments

Bruising in the white line and what it can it mean

1/3/2021

0 Comments

 
Picture
​Inevitably this time of year I get panicked calls or texts from owners asking about bruising in the white line. When horses are walking in snow and their hooves are relatively clean the bright reddish purple bruising can look quite alarming.

While this bruising can be a sign of something more serious, it is usually just caused by walking on frozen uneven ground.

Most of our domestic horses live in soft dirt paddocks or pastures and during our winters here in Western Canada, the ground will go through periods of thawing and freezing, creating soft mud one day and hard frozen lumpy ground the next. The horses adapt well and can move about awkwardly on the frozen uneven ground, but often they will take a misstep here or there and that can result in bruising of the white line as shown in the picture. This type of bruising is generally is isolated to just one hoof and doesn't generally cause soreness or lead to anything worse, but it can be alarming if you don't know the cause.

What if it's more serious? If you are seeing this bruising when the ground is not frozen and hard, or it is present in both front hooves or all four hooves equally, it could be a sign of repeated toe first landings or even laminitis (caused by metabolic conditions). 

The hoof functions as a shock absorber to the rest of the body, and to work this way the horse must land heel first where all of the shock absorbing structures are located. When there is a breakdown of hoof integrity in the rear of the hoof, horses will compensate by landing toe first. As there are no shock absorbing structures in the front half of the hoof, the impact can create this bruising among other more serious complications. You can use your cell phone to take video of your horse moving at a walk and a trot and play it back in slow motion to determine how they are landing. Occasional toe first landings are normal, such as when a horse is unmotivated or travelling uphill, but repeated toe first landings on soft surfaces such as a sand arena or pasture are a red flag and should be discussed with your vet and farrier.

Laminitis can also cause this bruising and horses with metabolic conditions are at a greater risk of suffering complications during wintertime. Here in Western Canada, it is common among horse owners to try and "fatten their horses up" leading up to wintertime with the belief that they will stay warmer during our cold winter months if they have a little extra "padding". While this is true, often we ride significantly less in the winter leading to a more sedentary day to day life for the horse. This increased weight and feed regimen can lead to an obese horse in a very short timeframe and can lead to laminitis. While I am certainly not advocating for under feeding your horse during winter, I recommend you watch their weight closely and manage it as you would throughout the rest of the year. Metabolic horses are a challenge to care for and keeping an eye on the integrity of the white line can be beneficial in preventing and becoming aware of hoof issues that can lead to laminitis. Bruising can be an indication of laminitic events, even if not enough to trigger full blown laminitis. A stretched white line is an indication of a loss of hoof wall connection and should be discussed with your vet and farrier. 
Picture
0 Comments

Hoof Growth Rings, Hoof Wall Connection and the Link to Laminitis and Founder

12/9/2020

1 Comment

 
In this post I want to address the common myth that growth rings indicate instances of laminitis. While they can indicate laminitis, it is rare that they do, and more importantly they are a roadmap to understanding the connection of the hoof wall to the coffin bone via the lamina.

I have been a barefoot trimmer for 11 years and have been teaching horse owners to trim their own horses for 6 years. Throughout my career I have seen both laminitic and foundered horses and I have been able to successfully rehabilitate many of them. The most important part of the rehab process is understanding the condition that you are dealing with.

Horse owners, vets, and farriers often use the terms laminitis and founder interchangeably, but it is my personal mission to educate people on the correct use of these terms. This is important because the physiology of each condition are quite different. ​​
Laminitis = inflammation / pathology of the lamina.

Founder = Separation of the coffin bone from the hoof wall (detachment of the lamina).
Laminitis alone does not create an external physical change to the appearance of the hoof. Laminitis is inflammation within the lamina of the hoof capsule. It is extremely painful for the horse, and can cause heat in the hoof and a throbbing digital pulse, but it doesn't not create flare externally on the hoof capsule. Laminitis and founder are not mutually exclusive; a horse can have laminitis and not founder, and a horse can be "mechanically foundered" and not have laminitis. A horse can also have laminitis that subsequently leads to founder, but this can often be prevented. For more on this check out our new online course linked below.

Founder is a disconnection between the hoof wall and the coffin bone that leads to the formation of a lamellar wedge (stretched white line). It is a breakdown of the lamellar attachment that allows the hoof wall to migrate out and away from the coffin bone. This results in the coffin bone's tip rotating downwards towards the sole and produces the flare that you see visually on the outside of the hoof.

​When looking at the growth rings of the hoof or at the wall structure itself it is important to know that in a healthy hoof the growth from the coronary band to the ground should be at a uniform angle as seen in the top hoof on the graphic below.
Picture
The hoof on the bottom of the graphic shows the wall coming in at a steeper angle at the top of the hoof and then progressively flaring as it grows down. The flaring indicates hoof wall disconnection and possibly founder. This graphic is from our newly released Laminitis and Founder Online Course. Check it out for more info on the complete rehab process and further clarification between laminitis and founder.

​In the picture below you can see significant growth rings present both halfway down the hoof and also just below the coronary band. This was a picture sent to me by a student who was worried her horse had suffered laminitis and she had not noticed it. The horse had not been lame or sore but because of the growth rings she was worried that she wasn't on the right track with her trimming. I get asked this question a lot so I though it best to explore it in this post. 
Picture
This horse was foundered when the student started trimming it a few months ago. I can tell this by the flared and rasped lamellar wedge in the bottom third of the hoof in comparison to the new growth angle at the top. With proper trimming resulting in a reduction of leverage on the lamellar wedge, the hoof wall and coffin bone that were once separated are reattaching. As they do so they are creating a tighter connection that when it grows down from the coronary band appears as a tighter growth ring. The first significant change is shown at the ring halfway down the hoof wall. This is when the correct trimming started that allowed the hoof wall connection to resume. The second ring just below the coronary band shows where the connection became even tighter as more of the wedge has been grown out. 

​The growth ring on the hoof below is not as significant as the picture above,  but it is indicative of a tighter hoof wall connection as well. In this horse's case, it was a new living environment and diet that allowed more frequent correct trimming that caused it. While his hoof health was already good, the connection was able to improve creating the growth ring you can see just above the halfway point of his hoof wall. 
Picture
Some people call these rings "event lines", and this is probably a more aptly named term, as they apply to an event that changed the connection of the hoof wall for some reason. These events can be more effective trimming methods, diet or living environment changes, health changes in the horse that affect hoof wall connection and more. 

My goal with this post was to answer the question of: "Are these growth rings indications of a laminitis event?" This is a question I get asked often, and hopefully with just the little bit of hoof knowledge I shared in this post it should help to clear things up. If you are looking to further your knowledge of the hoof check out our Online Hoof Anatomy, Theory and Barefoot Trimming Course. This course provides an in depth study of hoof anatomy and function and is a beginners guide to learning how to trim their own horse. 

​If you liked this post comment below or share it on our favorite social media app! I would greatly appreciate it. 

​Have a suggestion for a future blog topic? Email me!
1 Comment

Thrush - Is It Making Your Horse Lame?

10/3/2019

1 Comment

 
Picture
Picture
Thrush is something that at one time or another all horse owners will likely have to deal with. It is not a product of neglectful horse care, nor is it a product of unsanitary living environment etc. Thrush is a combination of bacteria and fungus that can eat away at the frog tissue in the hoof. These bacteria and fungus are more prominent in wet conditions and thrive in moist ground, but can also be a problem in dry conditions. In the image above you will see the healthy frog on the right, the thrush infected frog on the left. You will notice that the central sulcus, the area at the rear of the frog in the middle, in the healthy hoof is just a small indent, but in the affected hoof it is a deep crack. This is the first area that thrush usually starts to affect. What happens is the the thrush eats away at the healthy tissue and creates a "home" for itself within the sulcus of the frog. The deeper the crack, the better the hiding spot for the thrush to thrive and eat more healthy tissue. It is a vicious cycle and can be extremely hard to beat once it gets to this advanced stage.

Minor surface thrush is much easier to deal with. Some ratty tags on the frog, or a small infection of the central sulcus can usually be treated with diligent hoof picking and 2-3 times a week topical treatments with Artimud and/or HoofStuff. More severe thrush can take weeks or even months to clear up and can require soaking, booting and even diet/nutrition changes. 

So why is thrush an issue? At the start with a minor case, thrush doesn't really alter the horse in any way. If we catch it early enough and treat it then it is a non issue. If thrush persists and manages to eat into the frog tissue deeper it can cause the horse to feel some sensitivity when loading the back of their hoof and can cause them to land flat or toe first as opposed to heel first as they are intended to land. Horses land heel first in order to use the frog and its underlying structure, the digital cushion, to absorb impact and dissipate energy vibrations. When the horse alters its movement and doesn't land heel first that impact energy travels up the leg into the joints, shoulders/hip and back and causes excess strain on the body. This can create a cascade effect that can significantly affect the performance of the horse and in serious cases can even lead to lameness.

When the thrush eats through the frog and into the sensitive digital cushion it is extremely painful for the horse. The hoof and its outside structures are designed to protect, and are insensitive structures, meaning they do not have nerves and blood supply directly within them. The nerve receptors and blood supply are located within the sensitive structures: the digital cushion, solar corium and lamina. So this means that a minor surface infection of the frog really won't cause much pain, however once the thrush eats into the digital cushion it is in fact an open wound of the horse, and is painful when impacting the ground. The horse then alters their movement to avoid loading the frog as much as possible. This is an issue because of the previously mentioned strain on the body, but also because healthy frog tissue is generated because of positive impact forces, and without the horse loading the frog it won't receive these forces. This creates a long term problem as the frog and digital cushion will atrophy over time due to lack of stimulation and will alter the shape of the hoof capsule. You then have a significant reduction of impact energy dissipation and a horse that is absorbing that impact in their joints, therefore more prone to develop arthritis and other joint related conditions.

The pictures below show you the severity of a thrush infection once it gets into the digital cushion. These cadavers have the outside structures removed and the one on the left has an infection so deep that a hoof pick can be inserted into the crack approx 1/2 an inch. This is a deep open wound for the horse and extremely painful. The cadaver on the right shows a healthy digital cushion with a normal central sulcus without infection.
Picture
Photo credit to Kate Simmer, via Facebook
Picture

So what can we do about it? For minor infections treating topically is easy. Your local tack store will have several products available that are designed to kill the harmful bacteria and fungus that cause thrush. ​My personal word of of caution would be to read the ingredients label on those products. What you want is something that will kill the harmful bacteria and fungus, but not the healthy tissue. A lot of commercially made thrush products have ingredients like formaldehyde, formalin, turpentine etc. These substances are toxic to healthy tissues and will indeed kill the thrush but also the regenerating frog tissue. My favorite thrush products are made by Red Horse and are Artimud and HoofStuff.

Think about a deep thrush infection like an open wound on your own skin. Use products that will keep it clean but also encourage healthy growth. Products such as antibacterial wound scrubs used in human medicine, as well as barrier creams and ointments. My personal method for treating for this type of infection is as follows:

  • Thoroughly clean the hoof - I use Sole Cleanse to get into and around the crevices in the frog (be careful with a deep infection, it will hurt your horse to scrub inside there, instead use a syringe to flush the area with your cleaning solution). You can also soak in products such as White Lightning or Cleantrax. 
   
  • Dry the hoof and apply HoofStuff in the central sulcus of the frog very gently with your hoof pick. Then apply Artimud to the entire frog and collateral grooves. Remember less is more, you do not need to overfill the grooves.
 
  • Prepare your hoof boot of choice. Boots will help to keep the frog clean and dry and make sure your horse can't stand with their feet in their urine or manure which will further exasperate the infection. I use my Cavallo Trek boots, with a 1/2 inch thick felt pad inside, topped with GoldBond Medicated Foot Powder. Put the clean and dry hoof, coated in the zinc oxide cream into the boot. Note: to make felt boot pads I buy a 1/2 inch thick felt saddle pad for approx $40 and cut several boot pads out of this pad. It is far more economical then buying individual boot pads and they are machine washable and can be used a few times before they wear out. 
 
  • Repeat this process every second day. Continue this regimen until the infection has closed and the frog is sufficiently regenerated. For some horses long term boots can rub or irritate their heel bulbs or pasterns. Make sure you have the right fit of boot and style that can accommodate a felt pad, and I also use the Cavallo Pastern Wraps when needed.
Picture
Here you can see my horse wearing a very well used Cavallo Trek boot, packed with the felt pad and Gold Bond foot powder. These Treks are 3 years old and still work great as rehab and riding boots!
Picture
Easyboot Cloud therapy boots are also a great rehab boot. I sometimes use these if I need more protection for the hoof and a thicker padding. These are not suitable for riding so it makes them strictly a turnout/therapy boot. If you are looking for Cloud boots contact me as I can special order them.
1 Comment

Cinderella story, video update on Ruby the rescue pony

7/16/2018

3 Comments

 
Picture
The photo above shows Ruby when she arrived in late March, the video below was shot July 15, 2018.
3 Comments

Navicular Syndrome Explained

10/7/2015

0 Comments

 
PictureHealthy navicular bones and navicular bones with permanent damage
Published in Saddle Up Magazine September 2015

Most horse owners cringe at hearing the words Navicular Syndrome. In the past it has often meant expensive corrective shoeing and just trying to keep your horse sound for one more season, inevitably resulting in putting them down. Unfortunately Navicular Syndrome is one of the hardest subjects for a farrier/trimmer to research. It seems that every old text contradicts the next, and every person you talk to has a different understanding of the condition. The good news is that tons of new research is being done, and hopefully the equine world will soon have a better understanding that the best way to treat Navicular Syndrome is to prevent it in the first place, and that it is easy to do so.
 
One of the doctors at the forefront of Navicular research is Dr. Robert Bowker of Michigan State University. I had the pleasure of meeting Dr. Bowker at the 2015 Equine Education Summit hosted by Horse Council BC this past spring. Dr. Bowker states that he has identified a heel first landing as the most important element of hoof function and more importantly hoof development. He has determined that as the hoof impacts the ground heel first, the hoof expands both laterally and from the back to the front, and the concave sole descends lower to the ground, thus dramatically increasing the volume of the hoof capsule. This sudden increase in volume creates a vacuum, which pulls blood into the hoof capsule. This pull of blood not only nourishes the living tissues in the hoof, but acts as a very important hydraulic shock absorber.
 



It has been documented over the years that some horses with navicular bone changes are perfectly sound, while others without bone damage can show severe lameness in the rear of the hoof. This is confusing though as it has long been taught in the veterinary and farrier communities that the bone damage happened first and the pain associated with Navicular Syndrome was caused by the deep digital flexor tendon sliding over the rough surface of the damaged navicular bone.
 
Dr. James R. Rooney of the American College of Veterinarian Pathologists specializes in post mortem studies of horses. In thousands of dead horses he has examined, Dr. Rooney found that the fibrocartilages surrounding the flexor tendon and navicular bone were always damaged if bone deterioration was present. He has not found one single case where the bone was damaged and the fibrocartilage was not. He has however found cases where the bone was not yet deteriorated and yet the fibrocartilage had started to break down. He has learned that the order in which damage occurs is: first the fibrocartilages surrounding the navicular bone, second the fibrocartilages surrounding the deep digital flexor tendon, third the flexor tendon itself, and finally the navicular bone itself is damaged by the rough surface of the damaged flexor tendon. Simulating a toe first landing with cadaver horse legs in test machines, Dr. Rooney was able to simulate this exact process of deterioration, proving the order in which tissues were damaged leading to Navicular Syndrome.
 
The main structure in the front half of the hoof is the coffin bone. The sole and hoof wall are attached to it via the lamina. The digital cushion and the lateral cartilages form the rear half of the hoof. It is the rear half of the hoof that is responsible for dissipating the impact energy of movement. The front of the hoof has no impact absorbing structures, they are all fairly rigid. The digital cushion at birth is made up of primarily fat and is filled with nerves. As the foal moves the pressure and release of the frog causes fibrocartilage to grow from the front of the digital cushion and spread toward the back. By the time the horse has grown to an adult the digital cushion should have transformed into a mass of fibrocartilage. This fibrocartilage is responsible for protecting and cushioning the nerves as well as dissipating the energy of a heel first landing. The lateral cartilages at birth are tiny, less than 1/16th of an inch thick, and don’t extend to the underside of the frog and digital cushion yet. As the foal grows, with movement, flexion, and the expansion and contraction of the hoof mechanism the lateral cartilages grow. They should eventually extend to create a floor underneath the frog and digital cushion and should have developed to about an inch thick.
 
So why are most horse’s uncomfortable landing heel first? Because in domestication we tend to keep our foals on soft ground. Deeply bedding the stalls that restricts their movement, and keeping them on soft terrain when they are turned out. The soft ground inhibits the flexion, expansion and contract and negates the hoof mechanism as it was designed to work. This results in very commonly, adult horses with lateral cartilages as thin as 1/8th of an inch thick instead of the inch they should be, and with digital cushions that are underdeveloped, thin and weak.
Picture
On the left an atrophied and weak digital cushion, on the right a healthy digital cushion
Dr. Bowker has also found that bone loss associated with Navicular Syndrome can also be attributed to a lack of natural pressure in the navicular region of the hoof. He specifically blames peripheral loading i.e. shoeing the hoof to remove sole pressure or allowing the hoof wall to grow too long so that the sole, frog, and bars of the hoof cannot share in the weight baring pressures of movement as they were designed.
 
When we learn the science behind Navicular Syndrome, and when this information becomes mainstream, only then can we start to prevent these changes from happening. While we cannot heal the bone deterioration once it has happened, we can bring strength back to the digital cushion and lateral cartilages. We must first bring them back into work, by removing the peripheral loading devices, keeping a low heel and allowing the digital cushion to strengthen again. The digital cushion is filled with myoxoid tissue which is similar to stem cell tissue and Dr. Deborah Taylor of Auburn University has published that the digital cushion can regenerate if given the opportunity. And as discussed previously, horses with bone deterioration to the navicular bone can be made comfortable if the rest of the hoof is allowed to strengthen to support it.
 
If your horse is suffering from Navicular Syndrome or you want to learn more I would direct you to study the research of Dr. Robert Bowker, Dr. James R. Rooney and Dr. Deborah Taylor. They are leading the research right now, and are coming up with amazing information that is helping horses that would have previously been put down.
0 Comments

What does Founder look like?

7/7/2015

0 Comments

 
Published in Saddle Up Magazine August 2015


In last month’s article I discussed the difference between Laminitis and Founder. I explained that laminitis by definition is inflammation of the lamina in the hoof. The lamina affected are the sensitive lamina (surrounding the front and sides of the coffin bone) as well as the solar corium (the underside of the coffin bone). I also discussed that low grade laminitis left untreated, or during acute laminitis, the coffin bone can rotate within the hoof capsule becoming foundered. Founder is simply the rotation of the coffin bone. There is no almost or partly foundered. Either the bone is rotated or it is not. However, the severity of the rotation can vary. This is dependent of the overall health of the hoof prior to the laminitis, the length and severity of the laminitic episode as well as the current trimming/shoeing protocol. In this issue I want to show you what a foundered hoof looks like both inside and out.

In order to demonstrate a foundered hoof, I will first show you a healthy one. The hoof wall is well connected all the way from the coronary band to the ground, it is not flared, pulled forward, or separated.
Picture
In a foundered hoof the wall at the coronary band will start out at a healthy angle, even if it’s just for a 1/4 of an inch. As it descends it will abruptly change angle and flare forward. The lamina will be stretched or separated and the hoof wall will be flared. There are occasions where a wall can simply flare and not be foundered, in these cases the angle change is less abrupt and usually there will be more than one deviation. 
Picture
While it is extremely important to seek veterinary attention in the event of a laminitic event, it is also important to have your veterinarian x-ray your foundered horse and work closely with your farrier/trimmer in order to determine the severity of the rotation and how to correctly trim the hoof to alleviate pain and allow a healthy hoof to grow in. Founder is very serious but often times can be repaired. You must first understand how and why your horse developed the laminitis that lead to the founder, and remove all future triggers. This usually means working closely with your veterinarian to determine blood glucose levels, hormone levels and ruling out other various disease that can facilitate laminitis. Second you must have a competent trimmer/farrier that understands the condition of the hoof and can trim to alleviate the rotation and grow in a healthy well connected hoof wall from the coronary band down. This rehabilitation process can take 6-12 months depending on the severity and how fast the individual horse’s hoof grows. Often the horse can return to light work well before rehab is complete, but it is dependent on the individual case and I would strongly recommend to consult your veterinarian and farrier/trimmer first.
0 Comments

Laminitis or Founder, Two terms that are often used interchangeably, but do you know the difference?

7/7/2015

0 Comments

 
Published in Saddle Up Magazine July 2015

            The terms Laminitis and Founder are often used interchangeably by vets, farriers, trimmers and horse owners alike, however in my opinion they have two very different meanings. Laminitis is the inflammation of the sensitive lamina surrounding the coffin bone. This includes the sensitive lamina, found along the front and sides of the coffin bone, as well as the solar corium which is found on the bottom of the coffin bone. The sensitive lamina is the vasculature covering the coffin bone and it has nerves and a blood supply. The insensitive lamina is located on the inside of the hoof wall and has no blood supply or nerves and is semi-rigid in structure. The sensitive and insensitive lamina interlock like Velcro. This connection of the lamina supports the coffin bone’s position within the hoof.

Picture
The sensitive lamina surrounding the coffin bone after the wall is removed.
        There are two kinds of Laminitis, Acute and Chronic (Founder). Acute Laminitis is when the sensitive lamina becomes inflamed and the blood vessels swell. This causes pain because they are interlocked between the leaflets of the insensitive lamina that are semi-rigid and this connection doesn’t leave room for swelling. The solar corium can also become inflamed during the acute phase and cause bruising and eventually abscessing. A horse with acute laminitis will be extremely tender in their hooves, reluctant to move forward and often adopts a rocked back stance. Acute laminitis will usually last 2-5 days, and must be diagnosed by your veterinarian, who will also likely provide short term anti-inflammatories and care instructions. They should also work in conjunction with your farrier/trimmer to try and alleviate hoof pain and prevent further damaging the hoof. You must figure out what triggered the laminitic attack in the first place in order to prevent it from happening again. There are many causes for acute laminitis, some of the common ones are: carbohydrate overload (excess grain, green grass), hormonal changes (mares cycling in the spring), excess concussive forces (increased work on hard ground), over trimming, adverse reaction to medications, systemic infections, and stress.
Picture
Comparison of hoof wall attachment. Left: healthy Right: foundered
Chronic Laminitis or Founder as it is typically called, is the rotation and or sinking of the coffin bone within the hoof capsule. A horse can have acute laminitis and not founder if the triggers are removed quickly enough and the lamina heals. However, if the cause for the laminitis is not removed and the hooves are not properly trimmed and protected the horse can continue to suffer damage to the sensitive lamina which eventually lets go of the connection with the insensitive lamina, allowing the coffin bone to rotate and sink within the capsule. Whether it rotates one degree or ten, any rotation or sinking at all is classified as founder. Once the lamina separate they cannot be immediately reattached, but the connection can be regrown down from the coronary band as new hoof wall grows in. You will have to work closely with your farrier/trimmer in order to allow the hoof wall to grow in well-connected again, and often a shortened trimming cycle is necessary. It is a long process to rehabilitate a foundered hoof but it is possible.

            Founder is very common, and many horses live and even compete on foundered hooves without their owners knowing it. It’s not until these “timebomb” hooves eventually cause lameness that owners become aware. This is why education and knowledge become so important to the horse owner. Learn to understand what you are looking at when examining your horse’s hooves and how to evaluate their hoof health to prevent and avoid these types of problems in the long run.
Picture
The typical rocked back stance of a horse with acute laminitis
0 Comments

    Categories

    All
    Case Studies
    Equine Nutrition
    Hoof Pathology
    How To Resources
    Laminitis And Founder
    Navicular Syndrome
    Thrush
    Trimming Philosophy
    Trimming Principles

    Picture

    Author

    Kristi Luehr is a barefoot trimmer/farrier, author, and founder of the Okanagan School of Natural Hoof Care. She is certified by the Canadian Farrier School as well as the Oregon School of Natural Hoof Care, and also has certification in equine massage and dentistry. Her focus is to educate owners about hoof anatomy, function and proper barefoot trimming that supports and grows healthy and functional hooves specific to each horse's individual needs. She is the author of two online courses specific to hoof care and is always striving to create more educational content for students to learn from. 

    Archives

    September 2022
    April 2022
    February 2022
    August 2021
    May 2021
    April 2021
    March 2021
    February 2021
    January 2021
    December 2020
    December 2019
    November 2019
    October 2019
    August 2018
    July 2018
    October 2015
    July 2015
    April 2015
    March 2015
    February 2015
    October 2014

    RSS Feed

Picture
​© COPYRIGHT OKSNHC 2023. ALL RIGHTS RESERVED.
  • Home
  • About
    • Meet the Herd
    • Barefoot Performance Horsemanship Lessons and Training
    • Barefoot Performance Horsemanship Youth Leadership Program
  • Online Learning
    • OKSNHC Virtual Facebook Classroom
    • Online Hoof Anatomy, Theory and Barefoot Trimming Course
    • Laminitis and Founder Online Course
    • Glue-on Composite Shoe Online Course
    • Virtual Coaching and Online Consults >
      • How to take and organize hoof photos for consults
    • Reviews and Testimonials for Online Courses
  • Hands On Training
    • 5 Day Trimming Course
    • 4 Day Private Trimming Course
    • Weekend Workshops
    • Host a Clinic
    • Reviews and Testimonials
  • Online Course Login
  • Blog
  • Contact
  • Store