Yesterday I noticed that he was resting his right hind very persistently, and when walking up and down a hill looked quite stiff on it. He was also standing with the whole leg twisted slightly to the outside, and when turning would pivot on the leg and twist it right around rather than lifting it.
Trotting him out in the round yard, both directions, couldn't see a thing.
Got him out again tonight, same thing, resting hind leg, very stiff. Walked him up the hill again and this time it looked like he was 'stuck' on that hind leg, almost like stifle lock but without truly locking, if that makes any sense. Walking downhill, he was stumbling all over the place, like he had very little control of the leg. It was rotating severely outward, and when it was weight baring, it would shake and buckle a little. He looked like he was walking a little on the toe, and the pastern would get stuck and drag along for a moment.
But again, put him in the round yard, trotted out even. Got him doing some sharp turns in trot across the yard and he was a little slower on the right hind and started to show some short stepping.
Has anyone seen anything similar Any ideas on what he's done? I'll try and get a video of him going up and down the hill tomorrow.
I really don't want to go rushing off to the vet just yet, if he has just strained a muscle and I'm being a paranoid mum of accident prone horses, though I will give my vet a call tomorrow and see what he thinks. If I can get away with emailing him a video I will be pleased - my vet bill for this year alone is already exceeding $2000.00