This morning I noticed one of my hens has diarrhea and is not moving around as usual. Her bottom is hard, round and swollen as you can see: There was a piece of loose shell hanging from her vent which fell out easily. She's struggling to push something else out. I gave her a warm bath and oiled her vent but she seems to be deteriorating. What is the difference between EYP symptoms and egg bound symptoms? And what should I do? Please help.