Originally Posted by Laffeetaffee
A good way to discourage a horse from backing up is to let him back up as far as he wants.
Agreed. We got "Trogdor" ("Merry Boy's Hart, 2008, RIP) when he was 19yo and trained him to CW Reenacting, but he never really relaxed, even though he was always with my two Veterans, "Corporal", and "Ro Go Bar." The troops would get a kick out of him wheeling around and gaited backwards. We just let him do it until he wanted to stop, bc otherwise he was a nice guy and a very good trail horse.
I'm thinking you don't quite believe that this horse is healed. Neither does the trainer who kept jumping off.
I don't want to suggest spending more money on this horse since none of us has that much to spare. But I do think that you should consider that before you proceed, or consider rehoming him.
Is there any trainer who has been CA certified? We have one in our area. You might see and if so have the trainer check out your horse for possibly retraining.