My horse doesn't use his hind quarters and I cannot get him to do them under saddle. I was reading the Parelli site and everyone said "HILL THERAPY!" I completely understand how it works but I'm worried. He is 8 years old, so he is fully grown up and everything but hill therapy can be harsh on joints. Not only that but I was checking him out today and he's a little tub-a-lub. He has rolls, and definitely needs to be put on an exercise regiment, which I've already set up but I wanted to incorporate Hill Therapy to help him learn to use his Hind Quarters.
Has anyone ever done Hill Therapy? Should I put him on some joint supplements?