Possible navicular? Any similar experiences....?

bosephine15

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I'm at a bit of a loss with my horse, hopefully someone here can give some insight!

Horse's previous history (not including this year): 8 year old paint who does hunter/jumper that I've owned since she was 4 months old. Has had 3 attacks of laminitis, once at 3 years old and 2 separate times at 6 years old. They were all related to high fevers (one was virus related, and two were vaccine reactions). While she's not a hard keeper, she has not been overweight and never seemed to have a grass sensitivity, although she's never been on lush grass. She no longer receives vaccines unfortunately because her reactions are so severe, even while on bute for days before.
Other than the laminitis, of course, she has not had any significant lameness issues other than the odd abscess every couple of years and has been barefoot for most of her life.

The following x-rays were taken in 2012 for my farrier before putting shoes on due to an increased workload, just to have an idea of what was happening in her feet.





She was sound and had her shoes pulled for the winter. The next year she was barefoot and had the 2 attacks of laminitis. She had styrofoam cut out and placed on her feet which was quite amazing with how much relief it gave her. She recovered over that year and returned to work, sound, at 7.

Fast forward to this year. She started the year 100% sound training for the 1m jumpers with front shoes on. Had an amazing jump school one day (she didn't put a foot wrong), but the next day she turned up lame on her front right with swelling over her superficial flexor tendon. Thinking she tore it somehow, she stayed on stall rest for a couple of days with ice off and on until she could have an ultrasound. Did the ultrasound, didn't find any lesions, and the swelling was all superficial between the tendon and skin.

Gave her 2 weeks off with turn out and hand walking, the swelling went away, and she was sound on soft footing.
I went to slowly bring her back into work, but decided to ride in the grass ring with firmer footing so I didn't irritate her tendons in the deep sand. Well, it turned out she wasn't in fact sound and was foot sore on the hard ground.
There were some people in the barn who liked to feed her sugary treats, so we wondered if she was having a more mild attack of laminitis. She had a diet overhaul, we are treating her as if she has EMS (again, the vet confirms she is not overweight, but thought it was worth a shot). She had about a month off and appeared sound.

Over the summer she was back in work off and on. She appeared sound the entire time, but would have issues off and on that seemed to be behaviour linked (would jump sometimes, not other times). I thought maybe it was my riding, so I put 2 more experienced riders on her and she had the same issues. The one rider said she was ring sour. I finally decided that the behaviour was not like her and she must be in pain, and occasionally I could feel slight differences in her gait (sometimes the left hind felt out, sometimes her right shoulder felt stiff, etc.). Had the vet out, and they agreed she was sound. Passed all flexion tests in all 4 legs. Did a chiro as she does tend to get locked up in the SI joints. We continued going in circles....I had my farrier pull her shoes 2 weeks ago and she's been off work since then.

After pulling the shoes she was a bit tender hand walking over hard gravel, but nothing horribly dramatic considering she just had her shoes off. She gets her feet painted with iodine regularly to toughen her sole. However, she got worse and ended up obviously lame at the walk on hard ground and her white line was pink on both fronts.

Had the vet out to repeat the x-rays.

Here are the x-rays. We did equal shots left to right so I believe some were labelled in error:
LEFT DP

RIGHT DP




Also x-rayed her hocks. Vet said there are mild changes to her hocks but absolutely nothing out of the ordinary or dramatic. Feet showed her history of laminitis, but again nothing to explain what's happening. Sent the x-rays for a second opinion to the vet college and they had the same opinion. Vet watched her on soft ground and she appeared sound. Sent her hair for 5 panel QH genetic testing, mainly to rule out PSSM1. All tests came back negative.

Showed the vet how she went on gravel. At this point we're thinking laminitis again and toe pain. We blocked her front right heel and she showed dramatic improvement- looked completely sound on the right and really lame on the left. Blocked her front right toe which didn't give any additional improvement. So perhaps she's bruising/stressing her toes while she's taking weight off the heels.

Sorry for the novel but this horse has been quite confusing this year! I'm not happy about the definitive heel pain but it's certainly better than having no idea what's going on/wrongly thinking it's her toes. Of course, we aren't sure what's causing it. An MRI is the next step and we are looking into the logistics and cost of that. Given the fact that she's so much better on soft footing I'm leaning towards a navicular or joint issue. She's also much better with shoes, so I'm confident we can cover up the lameness with shoeing, but it certainly doesn't seem to improve it in the long run. And I don't want to be jumping her with a band-aid fix.

Does anyone have any experience with this? I am wondering if she can be managed barefoot, so at least when she's sore I'll know about it versus covering up her pain with shoes. Or perhaps we need to shoe her up as best we can to make her as comfortable as possible and just semi-retire her to light work. No matter what I just want what's best for her. I of course need to talk with my farrier further, who is excellent and very open to discussion/different options, but any advice would be great.
Thanks
 
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I can't seem to edit my post again but I forgot to mention that she's been hoof tested numerous times over the year and has never reacted on either foot, which added to our confusion all year. Even with the significant heel pain she doesn't hoof test. But again, we have now confirmed that it's an issue.
 
I'm at a bit of a loss with my horse, hopefully someone here can give some insight!

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its same with my Horse Problem
 
Surely they would have seen navicular changes on these x rays? Sounds like you will have to go down the mri route, hope you have insurance! As long as you do what is in the best interest of your horse, that is all you can do.. good luck and keep posting, would be interesting to know the outcome. Oh I wouldn't be putting shoes back on her until you have found the cause, it will just put unecessary pressure and interference on the hoof.
 
Her feet look unbalanced laterally to me, which would be enough to create navicular syndrome by stressing the collateral ligaments. She looks like she has significant sidebone (ossification of the lateral cartilages), which would also suggest imbalance. The condition of the navicular bone has little to no correlation with navicular spectrum lameness so you are right to question this. Blocking sound to the back half of the foot is also symptomatic.

Many of us in the UK (from your terminology you are not?) would resolve this by removing the shoes and working the horse slowly and consistently until it improves, in hand if necessary. Roads (blacktop?) are particularly helpful to shape the feet the way the horse needs them. The ideal to aim for is not to trim, but to let the horse create for itself the foot that it needs to support it.
 
You are correct, I'm not from the UK- thought a different perspective might help :)

Your comment about sidebone came as a bit of a shock- no vet that's looked at her x-rays (a total of 3 from the current ones and 1 from the 2012) has mentioned it. At this point it's actually hard to watch her walk on really hard ground because she's so sore. She is ok to walk on grass though, so I guess I'll start there. I'm glad I'm not crazy thinking shoes aren't a good idea right now.

I don't have insurance on her so I'm waiting to hear on the MRI cost but I'm going to do everything I can for her.
 
You are correct, I'm not from the UK- thought a different perspective might help :)

Your comment about sidebone came as a bit of a shock- no vet that's looked at her x-rays (a total of 3 from the current ones and 1 from the 2012) has mentioned it. At this point it's actually hard to watch her walk on really hard ground because she's so sore. She is ok to walk on grass though, so I guess I'll start there. I'm glad I'm not crazy thinking shoes aren't a good idea right now.

I don't have insurance on her so I'm waiting to hear on the MRI cost but I'm going to do everything I can for her.

I am shocked if no vet has mentioned the sidebone, it's symptomatic of foot unbalance but it should not be causing the lameness. Have a look at the following blog, done by the only fott lameness barefoot rehab yard in the UK. They have an unbelievably good record in restoring these horses to soundness.

http://rockleyfarm.blogspot.com
 
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She looks well trimmed, but not balanced. There is a flare forward toe going on that's extending the breakover. Hoof wall not parallel to fetlock and the run of bones not in line. If you look at the DP's and find those 2 darker spots and connect them and if that line is not parallel to the hoof at the ground, then you've got a medial/lateral imbalance as well.
Back to the toe, though. When the horse breaks over with flare forward, it pulls the whole hoof forward, right back to the heels. This is like bending your fingernail back and walking on it. Whether flare or flare forward, it hurts. This is one source of discomfort. As this toe pull continues, it pulls the hoof oval shaped and thins the sole from the apex of the frog forward. This is another source of discomfort. Thrush is another. Two things are happening with a thin sole. P3 is closer to the ground and when weighted, comes down on that thin sole on the inside. The ground is also coming up on that thin sole on the outside. The inside becomes inflammed, which invites bone changes and abscesses happening from the outside. If you pick up the foot and put a ruler across from 9-3 o'clock and measure down from the top of the wall to the bottom of the groove at the apex, you should see 3/4's at its best, but anything less than a 1/2" and you need protection for the bone. So, IF your horse has a thin sole, this is important. Damage to P3 will not remediate, it is permanent.
I think the real clue here is the styrofoam padding and how she improved so much. Styrofoam doesn't have much give, more of a barrier for the more serious troubles. I would use children's playground mats for the rubber and "give back" or get professional pads. I still prefer the kids mats, cause I can cut them up and configure them in different ways to achieve comfort. The pads in the boots are magic. You are not just protecting the foot, but giving confidence to the horse, which means more movement/proper mechanism and at the same time you are building the hoof. A month or two should see the time to grow a thicker sole, if needed and frog that is ready to partner up with the heels. Boots with pads will get her over the hump in half the time. If you look at the lateral rads and the slightly saggy shape of the heel bulbs? Pads will build the frog and digital cushion and fix that too. (both frog and heels wider, heels comes back and stands up, thrush spit out, and the accordian- like squeeze of contracted heels unfolds and relieves navicular-like symptoms. Shoes will do none of this.
Just my opinion, and a description like I was looking at a picture instead of a rad, but I see beautiful bones and don't have anything to say...not a lolipop, nuthin'. But I do see two different balance reactions in right vs. left and both have flare forward. The left's flare is long and low, letting P3's nose down and the right has too much toe height and is flipping the balance on P3 towards a negative palmer angle.That last one is really hard on the DDFT as it passes the navicular. The bone is ground parallel right now and the front hoof wall is taking on a bubbled out shape. This is separation starting to happen. The bone is being pulled back from the wall. So, I would throw the word "balance" often during the next farrier visit and have these xrays in hand. Yes, it is this forward toe pathology that puts the horse on the road to navicular, but get balanced and you get the horse right off that road forever. Ah, youth, protect it and keep it that way. Hope this helps, and may you have a good conversation with the farrier when he comes.
 
I could have written this about my sisters mare, however in these past few days she has got considerably worse and is dreadfully lame in walk. I'm worried for her. Missyclaire I would love to hear ur thoughts on her X-rays which I have posted here before

Op, best of luck with ur horse. Don't be afraid to take the advice from people here (alongside ur vet of course) there is a massive range of experience and knowledge on here and people are sometimes less "old fashioned" in their thinking than qualified professionals which can open up a lot more options. I would give anything to be able to send my sisters horse to Rockley
 
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