Hind hoof wear...tell me what this means

Physically, my horse with a million problems seems to be doing pretty well. We have some emotional/mental baggage to work through, but he came through 30 days of boot camp sound and I’m getting another h/j rider to get on him 2-3 times a week. He has some reluctance to go forward with me. Due to many months of being told by the vets to ride but it not being ok to him to be ridden. But he’s forward and pretty willing with my other rider. We’ve worked through a lot of the mental stuff with me out of the saddle. But he’s not totally trusting of me in the saddle. My saddle also had to get refitted again.

Anyway, I pulled his shoes in November because he went and lived outside for all of December, and we still have some snowy months ahead. His left hind foot looks great. He does wear the toes a little short (giving the appearance of a bit of a bullnose, but he grows a ton of tall heel, so farrier says it’s not a true bullnose), but the wall is healthier than it used to be, he’s not foot sore, and so I think he’ll do fine till the end of snow season when I’ll put hind shoes back on to prevent extreme wear later on.

The right hind foot has the same toe wear, but he’s also getting a bit flared on the inside wall and a bit straight on the outside wall. He isn’t wearing the outside wall down (which he would have done in the past by chipping it off more)–farrier measured the wall height. It’s just the outside is more upright and inside more flared. There isn’t separation on the inside and the farrier is rolling it to prevent that from happening. He’s just clearly not loading it as evenly as the other hind.

Watching him from behind, there is no twist in the hocks, but he does tend to supinate–load the outside wall more. He’s got a bit of a swinging, slightly wide movement behind. Part of his conformation. Part of his genes. Part of his physical asymmetries and issues.

Why would he not be loading this foot evenly?

He used to toe drag some on the right. This is much better. This leg still is a bit harder for him to bring forward evenly from the pelvis, but that is also better and any stiffness he is warming up out of well because we have gotten his lumbar area much looser. He seems to like being in consistent work (even if light), and a low sugar, high protein and moderate fat diet is working for him. It’s now been a year since we injected his hocks (and that was the first time ever). I thought that his hocks had some inflammation secondary to the SI, but perhaps it was primary. We aren’t really sure. He flexes clean and always has, but he had some inflammation show up on bone scan, which is why we injected. He did have a little worse fluid quality in the right than the left at that time. He has some chronic fetlock effusion going on in left hind, and he will sometimes self-adjust with a loud POP there, but movement on the left hind is pretty normal. We are now 5 months from his last SI and neck injections. The only thing I notice under saddle is a slight feeling of lack of impulsion from left hind when traveling on the left rein partially due to him being a little stiff in the ribs on the left. Right hind actually feels pretty good. He’s still got a ways to go to get really strong back there–we’ve finally just unwound the pain cycle. Plus, he needs to learn a work ethic.

I think it’s time for a checkup, since I need to stay ahead of his maintenance before things spiral out of control again. Just looking for some possibilities for the change in this foot that I can bring up with the vets. His main vet is out on leave right now, and I’m going to start with the chiro vet anyway because his neck is also getting super stiff for his stretches. So, could be a while before he has a thorough exam.

He would not be loading his hoof evenly because he does not have perfect conformation and he walks/moves on uneven surfaces.

When he was barefoot behind in the past, he did not get this inside flare on this foot. If it’s just conformation, wouldn’t that have been the case previously?

Too many subtle things that can cause it. Could be cause he’s weak behind, not using himself properly, along with tons of other things. For mine it means he’s stiff through his back and I need to use his BOT back pad and less riding with more longlining/stretching. But your horses could be caused by a totally different thing.

Without seeing conformation pictures and a video of him moving on a flat, hard surface like asphalt, it’s really hard to say.

Inside flare to me suggests a tendency to bow out with movement and/or an actual conformation bow in the hind leg - you did say he moves wide behind. It also could suggest a horse that is either sore or weak and lacking the real lifting power of a strong quadriceps muscle.

If this is the horse you’ve posted about before who has had many, many issues…you may be fishing for a needle in a haystack. I say that with the greatest sympathy, as I have owned one of those horses and by the time she left this world I could have created a very complex flow chart about all her physical and emotional issues with a lot of “?” still left at the end.

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I’m thinking it’s just a symptom of one of the problems. Since he is comfortable at the moment and starting to get fit, I’m just trying to notice these things and take any action necessary to keep us from sliding back down the rabbit hole.

His legs do not bow. Not sure I have video directly from behind. He has a wider than average stance with the hind legs and moves with some lateral swing behind. About the same on both sides when watching from behind. It’s a little hard to describe. But it’s like each leg swings a bit towards midline as the hock bends and the foot is brought cranially. But it does not land narrow but as the hock goes from most bend to then the foot coming back down, it comes back out to his neutral. Some dressage people go oooh look at that suspension! My sport vets go hmmmm…

At the walk at least post-development of this flare, when the right foot is on the ground, it has the appearance of more pushing off from the lateral side of the foot compared to the left, even though the left leg still has the same swing. The only real difference in the two is watching from the side, the right leg is prone to having a little difficulty in the up part of the cranial movement, which results in toe drag. However, in the past few months, this has gotten a LOT better (mostly shows up when stiff and lazy in warmup on the longe to the left), and he almost never did it with a rider up. He may be having a harder time with the quads on that side…that would not be unusual.

Anyway, I’m mostly wondering hmm… is it time to do the hocks again? Does his SI need another tune-up? Is there something else I’m not quite getting right in the reconditioning program? It’s been a LOT of work to get a more often than not happy and forward horse with a back that doesn’t feel like metal tubing, so I just want to keep up the good trend!

without xraying the feet there is no way to know if everything is straight inside. There are a million reasons from the internal condition of the hoof, right up to the joints attached. Horses wearing the toes of the hinds by dragging the hind feet over is a red flag for sacro/pelvic/stifle issues though in my experience. Flares develop to balance the hoof or body out from other factors, ie uneven loading could be from osteo arthritis of the spavin bone causing the foot fall to be uneven from pain. Horses that develop flares are loading for a reason that way, but getting to the bottom of that is as much a mystery as anything else horse related.

You said you pulled the shoes in November.

Sorry, wasn’t clear. He has spent a lot of time not shod prior to this round of pulling hind shoes.

He was barefoot all around until November a year ago, at which time I put on fronts. I put on hinds a cycle later (waited a bit because he’s not the best at standing for farrier, and getting front shoes on was the priority) because he had worn RH toe down too much (from the toe dragging), so he could grow more foot and while we went through the bone scan and other million diagnostics. At that time he was 6 1/2 years old. So, kept the hind shoes on for about a year then pulled off for winter since he spent some time living outside. So, in the course of his life, he’s been barefoot behind far longer than shod. And now the growth/wear pattern is different with this straighter outside wall and more flared inside wall.

In addition to the myriad of problems, this horse also grew and matured. He is bigger and heavier than he was in the past, but his hooves are the same size.