We love our 12 year old AMHR bay pinto stallion. He is strong and beautiful. But we are considering looking for a homozygous more refined double registered stallion and gelding him. We had started training him to drive (round pen commands and ground driving, actually hooked him up to a cart but kept a lead person attached) As a stallion he may be a little much to drive. I do not even want to think about what could happen if the driving horse in front of him was a mare in heat. How much do you think his stallion attitude would change if we gelded him? Is it too late?