Hi! We're anxious because our 9 month old hens' egg production has dropped drastically. We live in Minnesota and were gleeful that we continued to get 2-4 eggs per day (we have 4 hens) throughout the winter. Suddenly in the last couple of weeks, production has dropped to as low as one egg a day (sometimes two, sometimes three). The girls are all still acting like their perky, enthusiastic selves. Ideas? Thank you!!