i have 13 girls born april may no problem all get along ri reds golden sexlinks and 1 gunea hen as well 3 black windottes. recently got a new coop and 2 5 week old americanas i kept them isolated 2-3 weeks .. left them out in the chicken run with my other girls they killed or pecked to death one of them!!! my other one is alone dont know what to do looking for young one to keep her company!!! why so mean?????