My Chicken Nutmeg passed away the other day. She "Tricked" me because we have 2 broodie chickens and I thought she was a third. She was lethargic and by the time I was going to ease her pain she passed away minutes before. Honestly I am 99% sure it was her with the issue, because all my other blue egg layers laid that day. It was a sad day for us all.
It does reinforce the love I have for our chickens (and ducks) and wanting to make sure they are healthy and happy. Thank you all above who helped diagnose.