I have 10 girls. 3 are about 1.5 years old, 5 are around 35-40 weeks old and 2 are around 25 weeks old or so. I'm not sure who is isn't laying, but when I had 8 chickens I was getting 5-6 eggs a day so I at least know that 5-6 of them are definately laying....or had been. I got the 2 younger chickens a few weeks ago and since then my egg production has degreased to 1-3 eggs a day! I live in Maine and it has been getting colder now as well as the sunlight has decreased. I've heard that when sunlight decreases so does egg production, is that true? Should I have a light on in the coop at night to keep them warm and to increase the amount of light they are exposed to? Please help!! My husband is still offering people eggs and now that we aren't getting as many the demand can't be filled!