So, my little red hen stayed inside the coop on a cold day, but otherwise seemed ok. The other 4 were out in their yard. The next day she stayed in the nesting box. I brought her inside that afternoon, hoping that being warm would help her to heal. She had very watery poops and I didn't feel an egg. She ate and drank a bit. The next morning she was laying quietly. A little later her eyes were closed and her breathing labored. Within the hour I heard her move a bit and then she was dead. So far the other girls are healthy. Any clues what got her?