My older gelding does the same thing after a trim. He is a TWH and has arthritis in his hips and knees and the farrier before last was just a complete asshole about yanking his hind end up way to high. Now we trim ourselves and hubby made me a nice hoof stand that Noggin can rest his hoof on and not be in pain.

When he is hurting I put liniment on his hip joints and rub away. He loves it and usually feels better the next day or so.

"Stupid people need to be spayed and castrated so they can't crap their spawn out on the rest of us and suck the life out of the world!"