Thank you, i guess thats it. I appreciate itIt's most likely just the change of the season. When the days start getting shorter, many hens will stop laying until the days start getting longer. You could put a light in their coop, and leave it on so they get 14 hours of light a day, or you can just accept it and anticipate Spring.
It would also be smart to check the hens over for any disease or insect problems. Mites and lice can cause hens to stop laying.