I have 3 hens that are 24 weeks tomorrow and they haven't started laying yet. Our hen house is good sized and I recently installed a light bulb for heat and to trick the girls into producing eggs even though the nights are coming quick. The hen house has 3 windows for ventilation but with Kansas winters I think I should plug them up. The hen house is not caulked so the gaps in the wood should allow some air in. Will the girls be o.k. with the windows plugged and a light on or should I not plug up the house? Suggestions or Advise needed.