OK... I have one hen laying and another that has been looking ready... There was an egg in the nest this morning from my laying hen.. AND a yolk in the run. A HUGE yolk. just a yolk.? is everything OK? there is no remnants of anything besides the yolk. Do I need to be worried about pieces of an egg stuck in her body? do I need to be worried about infection? can a chicken just lay a yolk and not anything else? I know I've read about a partially formed shell or membrane. but this was just the yolk. help please!