I am in a cold climate, we hit -30 to -50 with wind chills sometimes and mine stay closer to the hen house on those days but are normally free ranged, no additional lighting or heat and they weathered just fine because they had time to also get used to it like wild animals, They got more down like any other animal gets and undercoat for super cold weather if left to their own devices, had it sticking out through their feathers but didn't loose a single one.
Had a few hatch late and kept them inside for the winter as they hadn't had time to acclimatize on their own
Had a few hatch late and kept them inside for the winter as they hadn't had time to acclimatize on their own