I have 4 - 7 week old chicks that have been together since day 1. The Salmon Favorelle has always stayed away from the other 3 and I just thought she liked to do her own thing. Well, I just went to check on them and her back is completely bare and bloody. She wasn't like this a few hours ago. This is a pic I took after I cleaned her back off with some Vetericyn. What should I do? Can they pluck that many feathers out that quickly? This is my first disturbance in my small flock and I'm not sure what to do...any help or advice would be greatly appreciated! Hope everyone is having a Happy 4th!!