I am hatching 7 runner ducks (due the 15th) and I'm concerned about a coop. Or a pen. I have an acre in my backyard that is sorrounded by privacy fence and we have never had any problems with raccoons, but we do have feral cats in the neighborhood. Do ducks need to be cooped up at night? Is there a quick and easy way to do this? When they're babies we have shipping kennels they can live with, I'm only concerned about them when they are older.