So I just went out to the coop to gather eggs again and noticed my 22 wk Americauna hanging around inside. Thought it odd but didn't notice anything unusual until I peeked back inside and saw she was missing feathers on about a 2" square patch just above her tailfeathers, and it was all bloody. I shut the poor thing into the coop while her flockmates are outside. I'm just at a loss for what to do. I've always meant to get a first aid kit together but have been busy. They are all fed Purina Layena feed and we keep the feeder full at all times. The run is sand and we try to let them free range for at least an hour or so in the evenings (can't let them out unsupervised yet since our fence is not yet complete). So I wouldn't think it's a nutritional problem. They've been laying nice-shelled small eggs for about a week and a half now. I'm guessing she's the bottom of the pecking order since I always see her foraging alone and not with the others. This is the first time I've seen any aggression though--it seems really acute. Stinks too because I always thought her the most beautiful--like a golden eagle. Anyway, I'd appreciate any suggestions on treatment and your thoughts on further prevention. I've done nothing yet but separate her. I've tried to search through threads myself but I've not had much luck (and less time). Thanks in advance to all your comments!