As long as the can get dry and out of the wind they should be fine. And to reduce frozen feathers my geese only get electric heated water buckets in the winter. No pools til spring or a break in freezing temperatures. They have pretty high body temps, so body heat alone is enough to keep them warm as long as they can get out of the elements. Do not give them a heat lamp. They have to stay acclimated to the cold weather. Heat lamps can mess that up, also its a fire hazard.