I have a bunch of chicks that all hatched together a couple of months ago. All of the sudden I have noticed them aggressively fighting one another with one in particular taking the brunt of it all and bleeding pretty badly. Is this normal? Is this them establishing their own pecking order. I'm a bit surprised since they are all the same breed (Buff Orphington) and hatched together. Also surprised how aggressive they are. Never noticed this before in my previous chickens.