The ducks and chickens are cohabiting greatly. We put them all in the coop at night. The chickens go to sleep and the ducks party.
At night, the ducks snuggle in a corner opposite the older gals. I have shown the ducks the ways of the hanging feeders too and they are loving life.
We originally bought separate food but the ducks love to eat what the chickens eat so we ended up with a feed for both.