My rooster has been attacking one of my hens. This is NOT mating behavior. He successfully mounts and mates all the hens. Today he completely pecked out the eye of a hen he's been tormenting for two days now. He also tore her comb, and sliced her neck. I've seen him chase her across the property, chest butt her, and abuse her. I've got her isolated at the moment to heal and now he's begun tormenting one of the other hens. My flock has been together about a year. The rooster reached sexual maturity several months ago.