We have had a mild start to our winter, but the weather went cold. When it did my 10 chickens went from 5 eggs a day to around 1-3 (3 is a big day). I really am not sure on the chickens ages and I don't have the coop near the home, so I am not sure on every chicken that are laying. Is it the cold that's slowing them down? I did install lights in the coop but not helping yet.