I just got diagnosed with degenerative back disease, I've got a green off the track thoroughbred, and I'm 17 years old. I love my horse. He's got a load of potential to be a really special jumper. But, can I risk retraining him over upper level jumps? He used to school level 1, but he hasnt in about 3 years. Selling him is going to break my heart, but is it for the best for both of us? Imput is greatly appreciated.