Hi, I have a hen who is not looking at all well. I'm wondering if she might be egg bound. She seems to have poop on her back end, and when I picked her up, she threw up what looks like yellow bile. Her comb is flopped over and she's not moving around a lot, like she is in pain. We've had our flock for a couple of years, but this is the first illness I've encountered. Any suggestions appreciated!