I know there are lots of threads concerning pecking, but here's my situation. I have 25 birds. 10 White Rocks, 10 RIR, 3 black austrolorpes, and 2 Aracaunas. First the aracaunas were getting pecked at. One lost all the feathers on it's back. Then the other one was pecked. Then one of the blaks was pecked. This one lost all the feathers around her tail and vent. We tried pine tar, but to no avail. Now almost all the RIRs the Blacks and the Aracaunas are pecked, INCLUDING OUR ROOSTER!! However NONE of the White Rocks are missing a single feather. Interestingly enough, the White Rocks dont' even seem to be the culprets, the RIRs do. I'm a bit at a loss here. They have lots of room in the coop, and in the run, we built it large so we could expand the flock someday. They eat a heathy diet of layer pellets, prepcook veggie scraps from a local resturant, and bread from the local soup kitchen. Any ideas?