Do spavin & sacroiliac issues show same symptoms?

[Christmas Crumpet]

My horse has spavin but also a pulled muscle in his lumbar region and I'm quite interested to know about sacroiliac pain. The vet did mention it when I described symptoms but was then happy to accept physio's opinion of pulled muscle in lumbar region.

Horse shows all the normal signs of spavin - reluctance to step under, doesn't use hind end very well at the moment, can be funny to pick up hind legs, drags toes slightly when trotting etc etc. He was trotted up for vet last week and vet declared him in good form.

What other signs are there of sacroiliac pain?

As far as I am aware, horse hasn't had an accident at all. The only thing he has done since being brought back into work was go loopy after being stung by stinging nettles and gallop madly round the estate. Could this have strained his SI?

Sorry for slightly disjointed post but trying to get all questions in as I think of them!!

 

[the watcher]

I have a horse who is recovering from hock issues and you could see the effects very clearly along his back, there was muscle wasteage along both sides behind, more so on the side of the worst affected leg. So my view is that spavins will contribute to lack of balance and wasting around the sacroiliac area, which may then produce it's own problems

 

[Christmas Crumpet]

The muscle tweak is on the other side - worst leg is off hind. Muscle tweak on near hind right behind the saddle. Physio reckons he must have spooked or slipped. Makes sense as I've done that before and tweaked something as I righted myself.

He's looking pretty good in himself. He's had 8.5 weeks walking so far. We did have a break in the middle but he's been doing lots of hills and has got far better going up and down. He's not cautious or pottery going down any more. Seems quite happy really.

Vet has advised not to do any schooling because he doesn't need to go in tight circles at the moment. Just lots of hacking and he should be ok for hunting. "Should be"... if this muscle thing improves!!