Just put a group of 15 birds in a large coop and run that extends past 20’. Most birds are Dominique, 2 Americanus and one Icelandic. There are about 5 male/ females attacking the one Americanus bird. Plucking feathers and creating bald spot some blood. I am separating a bit for healing. Bought a spray for healing and deterrent. Why are the birds attacking?? They’re about 8 weeks old and have been together since hatching.