So my chicken for probably 3 or 4 weeks has been having what I would call messy butt but she is 29 weeks old has been laying since sept. She acts totally fine!! She eats, she active, she's not losing wt. She is completely normal except her butt.No one else has been like this. I clean her up and within a few days she's a mess again. Diarrhea can mean anything and since she is totally fine otherwise I don't know what to do with this. Any words of wisdom??? Please help!!