Yesterday, I was watching my chickens and one of the americauner (spelling questionable) was trying to lay eggs for the first time. This morning I found her dead in the coop but was successful at laying her first egg. Does this happen often? She was in good health getting a good balance of feed and greens, eating and drinking well. The other three appear to be fine. I even checked her body for any wounds, blood, parasites but nothing visible. Can anyone help with this mystery?