I just introduced my 2 brahmas, 2 barred rocks and 2 black sex links to the existing flock this past Friday. The Isa Browns seem to be very aggressive towards the newbies. I have tagged one that I caught being mean. Today both Barred Rocks were attacked rather viciously, to the point that they were wounded and were left with a half dollar size open wound on the back of their necks. I did wash, dry and apply bacitracin with some 4x4 gauze wrapped. I am looking for any help on how to help these two chickens and with introducing the newbies to the group....Thanks!