I went away last week and when I came home 3/4 of my birds had their feathers pulled. I left them with a clean coop plenty of food and water ect. The coop is designed for the number of birds I have, and they always have access to a 40 square ft. run. I'm planning on putting more perches in the coop, but is there anything else I can do to stop them from tearing each other apart? Also my orpington doesn't have any feathers missing. Is she the culprit? And if she is what should I do with her?