I seem to have the same conversation with my husband every year. He is not used to livestock keeping and wants to put heat lamps with the chickens. To me, they present a fire hazard and also make the hens more sensitive to the cold once they leave the lamp area. I have a small coop without a draft, but good ventilation and clean out their coop once a week. I replace shavings and straw shreds also once a week. I provide a dry area for sand/dust baths in the chicken run. Unless the water bucket freezes solid I don't worry about the cold. I have a heated waterer for that time.