We have 9 chickens they are about 15 weeks old. 3 bantams (hens), 4 silkies (2 Roos their names are Gus and Feather Foot, 1 hen and 1 unknown), 2 Easter Eggers (1 hen, 1 roo his name is chip) My Roos have taken turns being king of the coop. Today I witnessed something disturbing. That explains exposed white plumage on chips back where is tail starts, I had attributed it to puberty. I threw treats in the run and feather foot, currently king of the coop, ripped out a mouth full of chips feathers and ate them. Chip ran away and later cautiously returned to then be chased off. What to do???