We have eleven hens, and one of our older hens is having trouble walking/supporting herself. She is about 4 yrs old, and just 3 days ago she seems to be flopping around in the yard like a fish. Her legs appear to work fine, but she is unable to bear weight. Her breasts do appear swollen, with the breastbone appearing to look like it could break through the skin. The kids say that they haven't seen her get injured, but I am trying to research what could be wrong. We have separated her from the others, as they were starting to peck at her, tear up her comb. Any ideas??? I am willing to try anything, but there aren't any vets around here that will look at chickens!