Hi I am new to chickens. All my pullets were born since April. I realize those that were born in late July will not lay until the spring. I have 5 born in April that are laying well these past three months. I have 10 others born in April and May who are not laying yet, I believe. 9 of the 10 look mature - full red wattles and combs, and nice big bottoms. They all come into the coop. One is a mature Polish but she is barely 30 weeks old. Should I assume these other mature 8 will not lay until the spring or might they start laying during the winter? I get 2-4 eggs a day. We live in NH and I know we have about 11 hour days. I am not giving them artificial light.