Thanks! I will definitely be making a house for them, then. Does the rule about 2-4 feet of space in the (night time) coop for chickens apply to ducks, too?
JulieNKC - I like your idea about the feeder goldfish or minnows to distract the ducks - actually, we were planning on getting 50 or so goldfish to be in the pond, and they're cheap so that could work out.
Ducks and Banny hens - I don't worry about air predators. There are no Osprey or Eagles of any sort in my area, only Red-Tailed Hawks that aren't any bigger than my RIR rooster. I mainly worry about raccoons and possums in the woods behind our house.