I have raised chickens for 16 years, I have 9 hens who will be 2 years old in spring. My rooster died 2 months ago and ever since then, my hens stopped laying. I live in MD and it's cold, but I do have a light that goes on at 6 AM and goes off at 7 PM. I have not changed their diet, nor no fox have been stressing them. Does anyone have any sugestions? Or do I have to wait till spring? Thanks!