Hello, I went out in the pen today to check on my chickens, 6 RIR and one RIR roo. One of the hens was laying on the ground and her back was missing some feathers. I picked her up to put her in a small cage inside the pen so the other hens and rooster can't bother her and noticed that under one of her wings the skin is missing and I could see the muscle and more! She felt good enough to give a call out to the rooster when I picked her up. The pen that the chickens are in is totally enclosed A-framed. So I know it was not an outside pretator. Is she the roosters "favorite?" and he just took advantage. I beginning to think that the rooster is good for nothing except making me watch my back every time i go into the pen. Any ideas on how to help her, what could have happened or what to do with the roo would really help. Thanks.