I have a Cuckoo Maran rooster , 6 Isa brown hens and 1 Cuckoo Maran hen all 1 yr old. I recently acquired 3 Ameracauna hens and hatched 2 Cuckoo/ Isa brown mixes , all now about 4 mos. old. I've kept them all in the same coop but seperated the young ones to their own section to be viewed by the others. After a month went by and I let them all loose to roam the yard and the older birds would not stop attacking the younger ones. Will they ever let up and let the younger chickens join in?