Hi have owned my clydie X since he was 2,he is now rising 5, and did show signs of stifle dysfunction that the vet said would grow out of. It has returned now I am asking more of him in lessons, I don't know whether to spell him and start again with another horse or what to do. I have been doing lots of walking and warming him up for at least 45 mins and then I do flatwork. His off side diagonal when travelling clock wise looks like he hobbles, and he continually throws me over to the other side, and then I double sit and this goes on and on. what else can I do? please any suggestions would be really appreciated. hope I have made it clear for you to understand.