My flock was one year old yesterday. They came into lay around February. One of my Barred Rock hens has been shedding feathers like crazy for nearly two weeks. Based on what I've read here, it is an atypical molt. She started molting around her vent and up her keel and from her wings. She hasn't lost any feathers on her head or back that I can see. She appears otherwise healthy with clear eyes, good appetite, and red comb. She is the only bird in molt. I've checked her for mites and lice. Should I be looking for a cause or is this just a molt?