For several weeks now, Red Hen (RIR) has been laying in the coop. Friday when I let the chickens out, she bolted down the hill into the woods. I went to see where she went, but couldn't see her. She did the same thing Saturday, Sunday and Monday. I left them inside today since 14" of snow came down. I didn't alter anything or change bedding. What on earth is she doing? She doesn't sit on the eggs (she comes home at night and I have seen her with the others during the day), so what is going on?