We bought four hens over a week ago. Three are settling in very well, but one Rhode Island Red acts like something is wrong with her. The others will eat out of our hands but she just looks at it when it is held an inch from her beak. She has lost feathers in her back and vent area. We've treated her with Food Grade DE, but the other thing is she also walks slowly holding her left foot up hestantly as she walks. It's like something is wrong with her. She has laid eggs since being here so I don't think that's an issue, but she is smaller than the others and her eggs are smaller with a little gritty shell. I've seen her eat laying crumbles, scratch and loves meal worms. But she just acts so different than that other three I'm afraid something is wrong with her especially the way she walks. Any body have any suggestions recommendations?