answer:Chickens are fairly hardy but can suffer frostbite on their feet, combs and wattles. If there is snow on the ground or freezing or below freezing temps at night just be sure they have a draft free, but ventilated coop and they usually will huddle on their roosts for extra warmth. If you notice black spots on their combs or wattles that is a sign of frostbite. We had a cold wind storm the other day and our 7 hens were miserable, huddled by some boulders in their large yard and all upset. The wind was insane, chairs blowing around, raging. Even though their coop was open they just stood out in the wind looking miserable so we actually went up and carried them all into their large coop and locked them in. Chickens don’t win any prizes for problem solving. lol It is also good to feed them scratch grains before bed to help keep them warmer at night in cold temps.