Ok. Out of no where my once mild mannered BR has become a bully picking on one of my RIRs... She chases and pecks her whenever she gets near to the point where the RIR does not really want to come out of the coop. The pecking has caused some harm to the top of the head right behind the comb - missing feathers and some bleeding. How do I change this behavior? Right now I have let the bully out to free-range ALONE! There is peace in the coop when she is out. Help????? Thanks!