My 12 yr old Tb just injured his hock, we think galloping into the muddy paddock and we're pretty sure he slipped and did something. I went to feed my three horses last night and he could barely walk so I called my dad out but there wasn't any heat, but there was some swelling and he wouldn't put any weight on it. This morning I went out to feed again and he was putting a little more weight on it but not too much more, and he also wouldn't really walk. When I went out to feed tonight he wouldn't even go into his stall I had to lead him in which was a first! I felt his hock and it is even more swollen and there was a bit of heat and he wont really put much weight on it, so I massaged it with some Sore no More liniment which did a little, and he would try to put some weight on it but would snap it right up it hurt him too much! What should I do?!