Our Australorps are at the top which makes since as they have been around longer than the other girls. Amongst the others it seems to vary a lot but no one.... even the Australorps ever pick on our smaller Buff Brahma Blondie. She is the one that almost died as a baby when she got her leg caught in the brooder grow-out coop and hung upside down several hours. She never grew as big as our other Buff Brahma but she recovered and now barely limps,lays a couple eggs each week and chases other chickens around the yard...she will not take any crap off any of the others.