The horse will run the fence line, take the fence down, and raise h3ll all the time.
My thought is...CONTROL YOUR FREAKING STALLION. NOw that he's hurt another horse, possibly bred the mare (and that was a freaking ugly stallion too) and could have hurt someone. The mare's owner has tried slapping him with whip to keep him out of the barn, tried spraying a hose in his face and he won't go away if he happens to get in the pasture. He kicks doors and is generally distructive.
...people that don't control their animals and won't repair the damage their animals do irritate me! That's not being a good neighbor.