I agree completely. Had some health issues develop with my young colt when we sent him off at 3 years old to the trainer. My fault, he was thin, growing fast but not muscled up, and ended up getting ulcers later but we didn't know it. He bucked and pushed his nose up and out, and was not happy at all with his training, plus for a smart colt he didn't seem to learn a lot. His trainer was concerned because he developed "soundness" issues and we had him checked out by my vet and trainer's vet-chiro. Long story short he did have ulcers, they were irritated by the tight cinch, the pain caused him to also get sore in his back (probably didn't help that they used the horn to pull up into the saddle instead of a mounting block), and on and on. When I figured out he was sick, I pulled him out of training and let him be a horse in his pasture back home for a few months. He healed up from his ulcers and then I personally started over, working on his bad attitude by using an easy bit he liked, and teaching him to pull a cart (looser cinch, no weight on his back). We worked on that to get him to round his back and keep his head down instead of rooting through the bit and tossing his head. Now he's calm, responsive, soft, rounded, and enjoying being ridden. A fun ride and he wants to work - 180 degree change. Like Ray Hunt says, to go fast you need to go slow.