I have a broody hen who has been on an empty nest for probably 4 weeks. Today when she was off the nest eating, I noticed a large area (bigger than a marble, smaller than a golf ball) on her bum. It had a substance coming out of it that almost looked like jelly. It was dark and tarry. When I expressed it, it was obvious that it hurt her. I brought her inside, flushed it out with warm water with betadine, and packed it with Furazone. Sorry, I didn't think to take a picture tonight but can take one tomorrow. Has anyone else had anything like this happen?