I had a hen that I thought was going broody. She hunkered down in the favorite nesting box on 1 egg and after one day of her not moving I snuck 4 more eggs under her. For the next 2 days she stayed put. I put food and water directly in front of her and she drank some water but I never saw her eat. I checked on her this morning and she was asleep when I looked at her. She woke up and looked at me and then turned and tucked her head back in her feathers. I figured she went back to sleep. After making her a separate coop we went to check on her this evening and she was gone. I don't know, what happened? Any theories? She looked normal to me but I just can't figure out why she died.