this is my situation; 7 hens, 4 are over a year old. They layed eggs before, consistently, until this summer. 3 are six months old. one of them lays an egg. one roo, six months old they hang out together, as a flock when outside of coop in backyard I have placed two fake eggs inside coop Besides lighting, now, all summer no eggs. What should I do? The breed is Orpingtons.