I just found my chicken with a very swollen butt. I think there might be poop stuck to swollen area. There is also a green color to the swelled area. It is right below vent. I just recently cut her feathers in that area to clean her up, but now the feather seem to be missing or with the swelling it makes it look like they are gone. I don't know what this is or what to do. I am new at this. She is only 9 months old. Please help. See pictures please. How do I attache a picture?