My beautiful Blue Andelusian passed away today, she was not feeling well yesterday, and today, when I went to check on her tonight, she was sprawled out on the coop floor. I have no idea what could have happened to her. She had diarreah, but other than that she had no other symptoms. I am worried about my other chickens. Does anyone know what could cause a hen to just get sick and die? I should add, she layed an egg yesterday or the day before.