I have 5 Welsummers. They are suppose to be friendly, docile chickens, but they're not. I have one in particular that will peck my hand and fly at me. They are 20 weeks old. I just introduced 6 Welsummer/Amerucanas and they are all being picked on, one to the point she is bleeding pretty badly. I have the injured pullet in a separate cage inside of the coop so the other chickens are still around her, but they can't get at her. The coop and run are plenty big, so that's not the issue. Any ideas on how I can get the Welsummers to stop the pecking?