I have four 2 1/2 year old hens and added four fourteen week pullets. One of the white rock hens has decided she's mom and cares for the younger girls. Unfortunately, the two barred rock pullets seem to have formed a bond with "mom" that excludes the two orpingtons. One in particular is "low man" Her tail head is constantly being pecked at, and today when I came home she's pretty bloody. I'm fairly sure I know which Barred rock is the worst. What would be my best move? I'm afraid if it continues, the other hens will see the blood and start pecking too. This poor girl has few tail feathers and none on her back. I know pulling her out for nursing will put her through the wringer again when re-introduced. So now what? I was told Barred Rocks were friendly and docile, but that doesn't seem to be the case. Any help would be appreciated!