my hens have been not laying as much as usual. I have 13 laying hens and I got TWO eggs yesterday and no more than 7 the other days. I am really worried about them. They have had zero stress lately and no predator attacks since last December (the only one ever as well). What is wrong with them? I have been worried since like five months ago. They are also just coming into molt I think and all seem well and chipper too.