I really need some help fast. I just noticed a few hours ago that one of my hens was doing strange movements as if she was trying to pooh but couldn't. I also noticed that her vent was extremely dirty. All the feathers were covered in wet pooh. When I was cleaning her bum I noticed two small cuts near the vent, one of which had a green colour around it. She is still straining to get a pooh out and hasn't pooped at all. What should I do? Please help!