I agree with Pat. The horse is too young to have work done on him. Handle, light ground work - not too much longe to keep the tork off of his joints and lots of patience to let him develop mentally as well as physically. We're fond, here in the US of riding as soon as our feet won't drag on the ground - and the joint problems atest to that. In Europe they don't push and horses are working for years after sound. It's mental growth and not just physical maturity.