I got my drake as a mature bird with obvious frostbite injury to his caruncle. He decided on his own that he never wants a repeat of that event, so whenever the temperature dips into the single digits and below, he is conspicuously absent from the yard. It is the only time he uses the run in shed. He will come out when I put out fresh buckets of hot water and will soak his head for a few minutes, then heads back out of the elements. Even the geese, who have been eyeing the back of the shed as a nest site can't get him to vacate! He's a smart boy!