I noticed a rotting smell when I picked up my aunts hen, so I inspected her and found the area around her vent seems to be caked with this yellow stinky pasty stuff. Gave her a soak and then washed the area with Dawn dish soap. Which made a small improvement. I tried to remove some of the pasty yellow gunk and she wasn't having none of it. I'm assuming it's probably painful. Does anyone know how I can help her feel better? Sorrv for the graphic photos. She's the only hen with this issue.