I have a Cayuga pair in my flock of chickens. For a while, they spent their nights in the coop (in a corner) with the chickens, but they've turned into watch ducks and do not want to go to bed at dusk. The whole flock free ranges during the day and the ducks don't want to go back into the run at night any more.
So, I know I may someday be sorry I don't put them in the run at night, but for the time being, they're keeping watch on the whole yard. They tend to settle down on the front stoop, but by the time all the chickens come out of the coops, the ducks are back at the gate to the run, waiting for me to come let the chickens out to free range. Plus, I toss out a couple handsful of BOSS every morning..... (and every evening when I get home from work).
But they all get along just fine. There was some minor skirmishes as they were growing up, mostly clucking and running on the part of the chickens, when the ducks billed them... they're so curious, and they would pull feathers. Sometimes I find them sleeping together next to a couple of pullets, under the rose bushes.
