Shivers - any experiences?

chestnut cob

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Anyone have experience of or have a horse with shivers?

My horse (IDx) has shivers. I've always known about it, it was diagnosed when he was about 5 I believe and he's now 17. It's never caused him any major issues although he can be a bit tricky to shoe behind sometimes, farrier just needs to get him up against a wall so he can support himself. The symptoms have always been in his right hind leg only. He has been seen by the same physio for the last 3 years or so and when she came out before Xmas she said she thought he was starting to exhibit shivering symptoms in his left hind too. In Dec I'd called the vet because I thought his hocks needed re-medicating again, as he was looking a bit stiff on the RH. Vet said he thought this was more to do with his shivers progressing a little. Over the last month, he's had three shivering episodes (starts in HQs and flanks, sometimes a bit further up the body too) which he usually only gets infrequently and they are set off by something, not just random. In fact, the last time he had one was probably 2 years ago and it was because the hunt trotted past the yard. So, to have had three in a month is quite a change. He occasionally gets the typical shivers thing of snatching his leg up but it's always the right hind. Recently it's been getting harder to pick up his left hind (though by no means difficult, just that he's clearly finding it a bit tricky) and he's had a couple of those "snatching leg up and holding it there" episodes with the LH in the last week or so. They can be easily rectified by walking him forwards a few steps, and he always walks on normally. He backs up OK, under normal circumstances.

In terms of routine, management and feeding.... he is turned out overnight, anywhere from 5pm to 7pm, then comes in between 8am and midday the next day (so he's getting at least 16hrs, if not longer, every day..some days he doesn't come in at all). Diet is mainly good hay (rarely haylage as he doesn't tolerate it well) with a bit of Speedibeet and D&H High Fibre Nuts. Supplements are JointFX, linseed meal brewers yeast, and magox, plus seaweed every other day. He has a sachet of Danilon daily for his arthritis. I haven't changed anything in his diet for a long time, and he has minimal sugar.

I wondered if anyone could suggest anything I might be able to do or change that could help him? I will say now that he isn't in any distress, he has lived with shivers for 12 years or more. I'd just be interested to see how others manage the condition.

Thanks :)
 
My 26 year old is a shiverer. His is so bad we have to wedge a block of wood under his left hind to trim it (he is NOT distressed and carries on as normal in every other aspect of his life!) I find that the more work he is in the better the shivers are. I've also just changed his bedding from syraw to miscanthus and (whether its just coincidence or not) he is better since being on this. He was definitely better when out 24/7 over summer but yard doesn't allow horses out at night while on winter grazing.
 
Thanks, interesting to hear another story :)

I had a discussion with my farrier last year about shoeing etc as he says at some point he won't be able to shoe him behind, but will be able to trim. Mine is definitely better in full work... come to think of it, he was injured (not related to his shivers) before Xmas and hasn't really been in full work since so maybe it's related to the reduced workload...
 
Has he had a cold or other minor infection recently? We find with our IDx that he only displays symptoms when a few horses on the yard have colds and he is possibly fighting a cold off and a bit run down. He then shows gradual improvement after a few weeks. So for example on the bad week if you catch the inside hind doing up his rug leg straps he'll snatch his leg up something he normally never reacts to. Interestingly he also seems to be slightly worse when off cortaflex, our farrier had not noticed he had it until we swapped brand. Now we have swapped back he is fine. It is not supposed to help shivs but we find for him it does which possibly could mean his has a basis of a past injury or issue during growth so may not follow typical shiv symptoms.
 
He had a bacterial skin infection in the autumn (gone now) and has been randomly getting hives since he had a massive allergic reaction to alfalfa (the Simple Systems feed) in October/Nov. Vet said it often happens when they've had a reaction to one thing; other things set them off that didn't before. Otherwise he's been pretty healthy, has a lovely shiny coat, working well etc now he's getting over the injury. A few horses on the yard had noticeable coughs and snotty noses before Xmas which didn't really seem to affect him apart from a little bit of snot.. so maybe he has had a bit of a cold/virus. He does usually get one around Oct/Nov time, after his flu jab actually every year. Not seemed under the weather with it this year though and he was hunting fit until end of last year (maybe that's why it didn't affect him like the others who aren't in much work and not fit).

Something to bear in mind, thanks :)
 
I've been looking up stuff about EPSM (equine polysaccharide storage myopathy, otherwise known as PSSM polysaccharide storage myopathy) in case one of my gang may have it.

Some of Beth Valentine's stuff on EPSM mentions some EPSM horses having shivers. It's certainly in her book on Draft Horses. Might be worth you googling it in case you feel there are any other symptoms that he's showing? I haven't pursued that link because shivers isn't one of the symptoms my boy is showing, so I can't fill you in on any other details.

There's no "cure" for EPSM, but there are diet and exercise suggestions which can help, so if he did turn out to have that, you might find that you could tweak his management a bit to help?

Sarah
 
I've seen the EPSM stuff before so he is managed more or less as though he has it, in case it's related, hence the low sugar, high fibre diet and plenty of exercise and turnout. One of their suggestions is a Vit E/ Selenium supplement isn't it? I wonder whether it's worth thinking about that...

I'll have another look at her website as there may be some new info, it's been a while since I looked there. thanks :)

How are you managing your possible EPSM horse?
 
Within the next few days, I should have the result of his biopsy, which should show whether he does have EPSM. The hair test (only £25 from Animal Genetics in Cornwall) came back negative for type 1 EPSM, so the biopsy was really the next stage for us.

In the meantime, I started feeding him a feedmark product called Optimuscle (vitamin E, selenium, magnesium) and I also took the opportunity to balance his diet from a full forage analysis. Turns out that his dietary magnesium needed to be a fair bit higher than what's in Optimuscle (on its own, it looked ok, but in order to balance with high calcium in the hay, the magnesium needed to be even higher). But the vitamin E level in optimuscle is good.

So I've ordered some light magnesium oxide to be able to add to feed each day to meet the exact levels that he needs. Dr Kellon mentions magnesium deficiency as sometimes causing EPSM-like symptoms, and so one way or another I reckoned that was worth addressing.

I've not started supplementing oil, because I need to be very careful as he is such a good doer. And the last time I started adding oil, he put on 20kg in only a couple of weeks. So I thought I'd wait for confirmation of EPSM before deciding whether to risk oil again.

Managementwise, I'm trying to give him as much space to move as I reasonably can over winter, which means free access to a gravel yard and stable, and also access to the arena most of the time.

I've decided not to turn him out with the boys, as they do play rather intensively, so instead he is going out with the mares who are much more reserved in the way they play. So hopefully he's still socialising, but on a calmer level.

Exercise-wise, I've done virtually nothing with him this month, for other reasons. But if he does have EPSM I will probably look at turning him away fully over winter if I can't do something with him every day. When he does come back into work, I've found the Minnesota PSSM site really useful. I think it's in there, they suggest starting with just 5 minutes lunging on the first day, and build up by 2 minutes a day. Working every day and avoiding days off as much as possible. So it'll be 3 weeks or so before a rider is on his back, assuming that the work level builds up ok.

Whilst I try to build up gradually with all the ponies, I wouldn't build up quite so gradually unless a pony had EPSM. So the biopsy is important to me to determine whether I really DO need to start work in such a limited way.

Sarah
 
I own an 8 yr old Oldenburg mare who is a forelimb shiverer. I understand this is quite unusual. She is doing v well BD working medium and can actually do rein back thanks to her talented jockey. I don't think I've got her diet right and she sometimes seems to lack energy. Will try some of the supps referred to above. I think it's thought to be hereditary, progressive but a bit like MS can be in remission - plateau, and then another degenerative phase. This has certainly been the case with my mare. It occurs particularly in heavy horses and warm bloods. She is unshod and her feet are in great condition. She is happy and loves her work, in at night and out by day with company. University of Michigan has been doing research on shivers and I joined in on that as result of reference to it in HH about 15 months ago.
 
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