Oh and she had gradually started laying less and less which I attributed to molting. Her last egg was about a week ago and the shell was so thin it broke in the nesting box. That's her only thin shelled egg ever.
I noticed yesterday that one if my hens was laying down a lot more than usual. Today she was worse. She is still eating and drinking some. She is dirty around her vent and her crop feels like a water balloon. She has been losing her feathers so I guessed she was molting since it's about time...