I have a pond that's just under a acre. I am wondering if my ducklings can live there one day.they are swedish. Do they need a house due to predators? They cannot fly so leaving isn't a problem. It's a 200yard walk to my house from the pond so they won't know where I am. I plan to walk down there to visit them every day. It's in the woods. I only have 3 but would get more if they can live at a distance.