I'm having a similar issue, I believe. Three out of five of my hens have bare bottoms. One of the girls also has a bare back by her tail.
I read on another thread the suggestion that coop crowding might be the issue. I know that our roost is a tight fit for all 5 and one of them usually ends...
I know, big surprise, right? Someone in Portland with chickens!
We've had our chickens for about a year. We have 5 hens - 1 barred rock, 1 Rhode Island red, and 3 black sex links. I've been using BackyardChickens.com to research questions and answers for a while, but I'm just now needing to...