I agree with you all hole heartedly. Three is a much better age to start your horse, physically and mentally. I believe in taking it by incriments. Never over load or burn out your horse. The younger the horse the less amount of time is needed to spend on what your working on. It is like with children, attentions spans are less. We have a morgan and they grow slower and I think mature later mentally. We started him at three in the fall and got on him a couple of times. The next year I worked more with him, never overdoing. Last year we used him to do trail, and this year he is coming along so well with ring work. I have a morgan mare, same thing, and at 6 is finally mentally able to work and enjoy it for long periods. So many people get young horses and push it too soon. I am affraid on the end of the horses life it will affect them. Take time, spend it with your horse ont he ground, driving is so much fun and then when you are ready to mount, the horse knows what it he's to do. I would rather have my horses centered and be able to work for many years without breaking down.