I am starting a duck pen and run. I was thinking of a dog house for the pen. Already have one picked out.I know that a lot of ducks won't use a nest box but If i decided to make on and give one to them anyway could I leave it outside, like not even apart of the dog house. It would just be a box. Do you think they would use it and even if they didn't use it for laying an egg do you still think they would sit in there?