My 4 month old BR's sure are getting big fast. I ordered 9 girls but turned out to get 4 boys in the mix. Well the boys are starting to show their age but, Ive been noticing one roo/cock being a lil aggressive towards the girls. I figured it would just be boys against boys to figure out who the head of the grp would be but this one boy I saw the other day was going around to EVERYONE and biting them on the back of the necks. And Im not talking quick nips, Im talking like grabbing them and not wanting to let go. None of the other chickens want to be around him. When he comes around they all run off. Is it normal for him to be biting them all like that? Not to mention he has been coming after me too that lil turd.