Went to feed and water the girls today and as one of my EE hen's was feeding, my wife and I noted a bald spot at the base of her rear end (near the beginning of the tailfeathers) on her back. I don't have a picture but the skin did not appear open or weeping/draining, just a bit flaky or scaly. The color was mostly yellow and/or white so no infection or inflammation seemed to be present. The area was about the size of a 1/2 dollar and no other hen had this condition. Any ideas on what it may be or how to treat it? Hope the wizards here on BYC have some magic for my girl! Thanks!