This morning, our little boy opened the door to let the chickens out (as he does every morning after he holds them) and he found his favorite hen dead under the roost. She had thrush about 5 weeks ago and we treated it with apple cider vinegar. She cleared up in a few days and seemed fine, however she was 26 weeks old and still had not layed an egg. I'm wondering if an egg broke inside of her. She was fine yesterday except she did go into the coop before everyone else and this morning was dead. Any thoughts?