Thanks for your responses. I may be saying this wrong but he may have 'fractured' his left hock? I have it all written down and documented, not being a horse person I don't remember off hand. This would have been his most recent injury. Over the last 2 years we have had him x-rayed many times and we had taken some of his bone marrow and mixed it with other and then put back, we have done so much and I feel so bad if we are to put him down but you're right, what kind of life does he have. He is 21 and has lived a great life but the trainer/vet keep telling me that he seems so happy. I feel like they are judging me and they aren't to happy with maybe thinking of putting him down.