I got 3 RIR hens from a guy a few months ago. They all looked healthy and acted fine but he did tell me one was not laying. I noticed the feed he was giving them that morning was terribly molded. I have them on laying pellets now and all my hens seem fine except this same one. Here are the symptoms: First off I notice that her feathers around duct area seem to stay wet looking. Also noticed runny stool in the pen area again this morning, I assume from her. About a week ago she got to were she wanted to stay in a separate coop/nesting area I have and away from the other birds. I thought she might be getting broody but she just never completely acted like it, like sitting on a nest or nest box or becoming irritated. I also noticied that one of her legs seemed a bkt swollen to me and she acted a little like she was having trouble getting around. I thought one of the roos may have injured her or just was getting older. She was only supposed to be about 3 years old. I gave her a couple days then decided to make her come down out of there and closed that coop off. She immediately went to eating and drinking and acts better now and is feeding around the yard at this moment. But the wet feathers combined with runny stool and not laying still makes me think something is wrong. My first thought is parasites. Any other ideas?