I don't know if I am battling a molt, disease or a really bored chicken feather picker but I thought it was a molt, checked for mites and have seen the chickens pecking each others feathers out and I don't know what to do about it. I sprayed the affected one's bums with Blue Cote and that didn't seem to work so now I painted their baldness with Pine Tar. ETA they are all a year old. Here are some funny pictures of their tarred and feathered look. If anyone has advice...bring it on!