Our ducks live right with the chickens. I have 3 muscovy's that share the chicken coop with 45+ chickens. Yeah the ducks can be a little messy, but I have the pool outside for them, and the water in the coop has a lip for the water to go into. That way the ducks can't get into that water. They free range each day-all day. Coop opens at 5:30 each morning and I close it up about 9:30 each night. The ducks sometimes will even roost up with the chickens.