I am thinking about adding ducks to the mix around here. Probably not until next year so that my husband keeps his sanity. Can I keep the ducks in with the chickens? Will they be happy in the coop with them at night? I intend to free range everyone during the day. We have a bit of property and a creek. Will they come home at dusk like the chickens? Are they going to swim up the creek and never return? Any thoughts here would be greatly appreciated!