I keep chickens, ducks and a pair of Toulouse geese all in the same coop, which is 17 X 22 feet. (Was a carport once upon a time, but I had the fourth side built and the interior fixed up with nest boxes, roosts, feeders, an auto-waterer, and a separate Chick Kindergarten pen.) The auto-waterer is in one corner of the coop where everybody can drink, but it has a pointy lid and "portholes" so the chickens cannot perch on it and the ducks cannot swim in it. The spillage from duck bills stays in that corner and on hot days, the chickens love it for a "cool spot."
I do keep a separate waterer in the opposite corner of the coop, up on a step, so chickens not brave enough to shoulder their way past the ducks to drink (if any are in their way) can still get water inside the coop.
The ducks sleep on the floor in the deep pine shavings and the geese sleep in a plastic dog house inside the coop.
Outside, the ducks hang together. The pair of geese are comfortable on their own, or with the ducks, or with the chickens. They hang with anybody. The chickens will drink out of the waterfowl kiddie pools and the stock tank, but know to get out of the way when a duck or goose wants to get INTO the water.
I feed "All Flock" by Nutrena, and provide crushed oyster shell - or smashed up egg shells - in a separate dish.