Our chicken has a swollen back end. The vent area is protruding at least two inches out from her body and is very swollen. It started Sunday night, although we don't know exactly when - that was just when my husband saw that something was wrong when he locked the chickens up for the night. It was late, so we had to wait until the next day to look closer. When we first saw it the next day, the whole back end area was hugely swollen. It was golf ball sized or a little bigger, and completely round. We bathed her and got a lot of gunk off, but not all (some was pretty crusty). Later that day we bathed her again and by then it had reduced in size to what it is now. It's stayed like this all week. Today we bathed her again and while the area cleaned up fairly well in places, there is a huge amount of dried on, crusty gunk. I could get it off, but to do so removed some skin (so we left it alone). What is her problem and will she heal? There really isn't anything we can do other than bathe her, which doesn't seem to be doing much. I have a photo that I can post, but don't like to do so without knowing if that is okay. It's pretty gross!