I have a BA who pulls out everyones feathers. My rooster looks like a Naked Neck, One of my Delewares has a bald butt and one of my EE's has a bald back. I caught her in the act this afternoon plcking more feathers from my roo's neck. The really weird thing is he just sat there and let her do it. What can I do to stop this behavior or do I need to cull her?