I just got 6 new 3 day old chicks yesterday. One is a Buff Cochin and is such a bully- she is charging all of my 2 week olds and getting a beak full of head feathers and just yanking with everything she's got. She is not doing this to any of the other 3 day olds. Is she just a bully working on pecking order? No one seems inclined to retaliate and I'm stumped as to whether I need to separate them, or allow it as 'normal' behavior. There has been no blood shed yet- she isn't pecking, just pulling 'hair'. Any thoughts?