Ducks don't like ice very much.
The part they hate the most is when they find some water for a nice bath, get out and sit down, and then realize that they are stuck to the ice. Losing one's chest feathers does not bode well in February.
We did our best to save our dried loaves and to feed them to our village river friends. Their joy at our snacks was very clear. Not all of them made it through the winter, and you could even see a few of them trapped inside the ice (I resisted my urge to dig one out and roast it).