Your description of the quiet trail ride gone haywire is so accurate and its comforting to know that I'm not the only one. I was encouraged to read that solutions lie in putting them to work (circles, figure eights, etc..) both on the trail and in the arena which I've been doing. What's most difficult to understanding is whether the behavior is a reaction to deer/fox (fear) or just being headstrong buddy/barn sour. I have a greater concern for the later as the the battle goes on much longer when it is just wanting to go back to the barn. Does having a third animal on the property change the dynamics at all ?