This is our 4-year-old Barred Rock hen that hasn't layed eggs for over a year now. I took this photo today of her and I have no idea of what this is or how to start helping her. Thanks for any help. She is eating and moving about fine. As you can see this is below her vent. I did wet her rear end down before this photo so you could see better so that is why it's so wet back there.