I've only had chickens for three months and am not sure what is wrong with one of my hens. About 2 days ago she started getting a bit listless. Now she is listless, stands very tall, and though she doesn't walk much, she does waddle like a penguin when she does. She also barely eats and drinks. I thought she may be egg bound, but she is still pooping, though what comes out is very small. She also looks a bit ragged, but she's been dropping feather for several weeks now, so I think she's molting. Any advice for me? If she's not egg bound, what else could it be? Thanks!