I wondered the same thing before we got our polish chickens, but ours did fine this winter. They were under 6 months old at the time.
We didn't use anything special to keep them warm. I did notice that on the really cold days (-15 to -20) they seem sluggish, but all of our breeds did.
We didn't use anything special to keep them warm. I did notice that on the really cold days (-15 to -20) they seem sluggish, but all of our breeds did.