I'm super happy that this thread exists! This is my first winter with ducks, and even though I have read multiple articles and threads saying that ducks can handle cold weather, I still find myself looking for some reassuring words when it gets so cold that you feel it in your fingers and toes, and your beard freezes just from breathing. For those still wondering, my ducks have already been through many days of -20 to -28 C (-4 to -19 F ?), and appear to be quite happy. I check on them a bit more often on days like this.
They have an uninsulated coop that is tall enough for me to walk in. We use the deep litter method (Aside from the regular, I put down additional fresh straw on really cold days like today. -26). They have a number of rubber containers for water (which I refresh regularly, on the really cold days the water can freeze pretty quickly). I have started putting wood chips all over the ground around their water containers, because earlier in December, 2024, one of my Saxonies laid down beside a water container, and then had some of her feathers freeze to the ground because of excess water! I was worried for a bit, but was able to free her with warm water, and she is doing great! Since then I have started putting wood chips around the water trays, and I have not had this problem again (I have to do this regularly, because the ducks spread water everywhere, and then it freezes, and recreates those same icy conditions in which her feathers froze to the ground). When there is fresh snow, this is less of a problem, and they appear to really enjoy the fresh snow.
On really cold days, like today, my ducks spend more time in the coop, but still go out to eat, drink, wash themselves, and sometimes bed down in the packed snow. This morning, when I went out, it was around -28 C (it was colder during the night, and seemed totally fine). As soon as I opened the coop, the ducks happily waddled out. They didn’t stay out too long, and seemed unworried by the cold. I have noticed that on cold days like this, they bed down more often, and stay inside more, but, so far, are doing just fine.