I agree with the molting answers. My first batch of chickens is 18-19 months old, and many have been molting over the last 3 months, so they are not laying. Your chickens will do the same thing next fall. I have a lightbulb in my coop on at 5 AM to give them at least 12-13 hours a day to increase their laying in winter. Chickens lay best the first year and decrease with year. They should be laying again by February.