I have extra BO cockerels that are overdue for freezer camp (they go next week), and they have been beating on the NH pullets that I have that are the same age, but not the BO pullets. It is so bad I have to separate them during the day- they scalped one of the NHs and started doing it to another so I just keep them totally separate now. Does anyone know why this is? Just breed differences? They were all raised together.