We had a strange thing happen over the weekend. We locked our 10 birds (9 hens, 1 rooster) in their coop for one day while we were away. We almost never lock them in the coop; they are usually able to get out during the day. When we got back, everyone was quiet and huddled in their corner (there's 3 "cliques"). The rooster was wandering around, bloodied. His comb was a mess -- very bloody and damaged. 3 of the hens also had feathers pecked out of their backs, and one had some blood on its head. Seemed like there must have been a mad, wild fight. Never seen anything like that happen before with this group.