A bunch of my chickens have poopy butts and I was just wondering what some possible causes were. I only just recently noticed it, like within the past week or two. They are all acting perfectly fine and eating, drinking, etc., nothing unusual. They stopped laying for a while for fall/winter and molting but now I think 4 are laying again. I have 7. They are penned and are 2 years old. I've never had this problem. The pen was pretty dirty and sometimes they sleep on the roof if that makes a difference? But again, never had the issue and nothing has changed. I just completely emptied out the coop the other day though, put DE down, and added a bag of shavings. I think the coop and run is also too small so maybe moving them will help? We have a new coop built, just need to get a run. I have never wormed them before and was wondering if I should or if that would cause it? But don't want to worm unnecessarily.