Today at 9 am I went back to the cool to gather eggs. I found Walker my one barred rock hen who is about 6 months old dead on her side. No injury,not egg bound, abdomen was still warm but legs were stiff, eyes closed. She was one of my kids favorites not sure how I'll break the news to them and no idea what happened the other 23 hens are fine. No sign of disease either. There has been one hen laying monster sized eggs and there was one of those in the coop under another hen when I found her...can laying too big an egg kill a hen? What other causes can there be? Absolutely no sign of distress.