I have three bantam hens who all started laying about two months ago, and were laying great. Then, about two weeks ago, I noticed that I wasn't finding any eggs in the pen when I went to feed them daily. About ten days ago, my Cochin bantam hen went broody and started sitting on one egg (which wasn't even hers), and sat on it until yesterday. Now the egg she was sitting on is gone! I've searched the entire pen and I can't find a single egg laid by anyone in the past two weeks! I don't think they ate that one egg that the hen was sitting on, because there's no stains or yolk or shell anywhere. It's like it just disappeared. :/ What could be causing this? Have they stopped laying or are their eggs just growing wings and flying away? They should still lay for a while because they're not even a year old yet.