I posted this under Chicken Behavior but had a BYC member suggest I post here with pictures. So any thoughts? We bought 10 Araucana chicks two weeks ago that are now 6-7 weeks old, The two biggest ones seem to be very aggressive, They keep jumping on and biting the necks of the other chicks. Is this normal and if not what should I do to stop them? Also want to note that they are not mean with me just the other chicks.