I have 10 laying hens (5 Buff Orps and 5 Auaracanas). I got them on June 26th 2009 as day old chicks. I noticed that about 4 of them are losing their feathers near their tail. See the pictures of one of the Auaracanas below. Can anyone tell me what this might be? I am in Vermont and have a heat lamp in the coop. The coop stays at between 40 and 50 degrees at night. They have access to an outdoor pen during the day.
Thanks,
Brian


Thanks,
Brian