I have recently noticed Combs and other parts with injuries. I noticed that there is bumping noises coming from the chicken coop at night occassionally. I have 6 chickens and 4 have injuries while 2 seem perfectly fine. Am I dealing with a pecking order and chickens pecking on other chickens? Notice 1st picture at the top is a chicken with no injuries to comb. This is Roxie and I suspect she is one of peckers. They are about 7 months old.