During the day my Ducks Free Range and swim in our pond all day. In the evening I head to the pond and march them home. We are going on vacation in a few weeks and my original plan was to keep them in their pen and have someone come by to make sure they have water and food. My wife thinks they will freak out if they cannot get out of the pen. I told her they will be fine. What are your thoughts? Their pen is a 6 foot by 6 foot enclosed pen with an attached Dog House to provide them shelter. There are only two ducks.