This has never happened before. One of my Easter Eggers laid an egg that was only membrane, and maybe the beginnings of a shell. It had the consistency of a water balloon, sort of. I cut it open and there was a normal yolk and white inside. Is there something wrong with the hen? My feeding practices? I feed them 30% high protein feed (Startena) and 70% Layena (or similar local product). I added the Startena because the girls were picking frightfully; it did stop the picking. Also feed scratch and crumbled oyster shell. Then there's the occasional snack of fresh fruit or veggies. Does anyone know what might cause this?