I have a flock of 28 hens and one rooster. My roo is a total gentleman. That is, until recently. After her third hatch, I have tried reintroducing my buff Orpington back into the flock. I've tried everything for now two months, but for some reason, my roo is suddenly aggressive towards this hen. She hides constantly. He has cut her comb, eyelid, and head. What can I do? These two have been together since they were a day old for two years now. I love my rooster, but this is my favorite hen. He does not fight with any of the 27 other hens. Any suggestions? Thank you for your help.