Our white barred rock became infested with leg mites. We washed her legs with dawn soapy water and also dusted her, the coop, and run. The mites seem to be gone, but she is not growing. The other hens of the exact same age are more than double her size. Her crest is a pale orange so I think she's probably anemic from the mites. Two days ago she developed problems walking. The joint on one of her legs looks a little swollen and she avoids putting weight on it so she just lays in her box all day. There are no signs of injury at all. She's alert and is eating and drinking well. Is this some new illness or is this related to the anemia? We are feeding her a high protein diet to help build her up and hopefully raise her iron. We feed her dehydrated worms, medicated feed, and black sunflower seeds daily. Is there hope she'll recuperate fully? The other hens in the flock never came down with mites. Are white hens more delicate or susceptible to illness and disease? Any ideas or suggestions???? I'm a relatively new chicken owner. Is it best to put her down?