Do Chickens Need a Coop Heater in Winter?
No for most large breeds to 0°F
Dry, draft-free, ventilated hens with liquid water handle cold via feathers. Cold + wet + wind = frostbite, not cold alone.
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Heat if: Seramas/bantams below 20°F, sick/molting, weeks below -10°F with past comb damage. Then panel only – see best heater. Never heat to 60°F – stops acclimation, worse if power fails.
Fix first: ventilation, water. External: UMN Extension.