I lived in Northern CO for awhile, with chickens and peafowl. We had some brutally cold days with awful winds, remember one storm with actual temps down to -30 and windchills to -60. Didn't have any added heat, all birds were fine. Peafowl lived in a large, open barn and the chickens in a small coop with good ventilation. No frostbite. Choose your breeds well as far as combs, feathering, hardiness. Build the coop for the climate and keep them healthy with veggie and fruit scraps, quality food.
I would consider a heat lamp with below zero extended temps depending on breeds and ages but otherwise, no. Insulation would be really nice, though and building your coop with a good windbreak is the best help.
I would consider a heat lamp with below zero extended temps depending on breeds and ages but otherwise, no. Insulation would be really nice, though and building your coop with a good windbreak is the best help.