The ducks are HUGE! HUGE! HUGE! they are now, at 4.5 weeks old, sleeping outside in the duckhouse. We hung up the brooder light in the duckhouse to keep them warm, a they still dont have a lot of feathers. They keep getting more and more feathers but they are not even close to a full jacket. It's unbelievable how quickly they have grown and how funny their quacks keep getting.