I have 3 chickens. Two Barred Rocks, and 1 Rhode Island Red. They are almost 1year old. One of the Barred Rock hens has started to peck the other two. There has always been some pecking. But not to this extent. This morning when I let them out of the coop, the Rhode Island red (who seems to be getting it the worse of the two, had been bleeding. The bleeding appeared to have clotted and it seems it might be from a pin feather. I am not sure what to do??? These are my first chickens. A friend told me to just let them be. No worries, but is that really true?? How do I break this behavior if it can be broken at all. And is there anything to do for the area where they are being pecked?