I found one of our girls this morning by the coop door. Don't know what happened but I think maybe she was egg bound. Last night the girls were making an awful ruckus, but they were fine when I checked them before I went to bed. This morning they were still quite noisy so I went to feed them and the poor hen was just lying there. When I removed her, it looked like there were bubbles in her vent and it smelt like rotten eggs. We have been so lucky this winter, this is the first one we have lost since we got them as day olds, except for 2 day old chicks that didn't make it. I miss my girl, I feel so bad.