We live on a small hobby farm. One acre of it is fenced with 6 foot privacy fence, and contains our chickens (in a secure coop with their own 3' fenced run) and our garden (also separately 3' fenced to keep the dog out of it). The area also contains some small unfenced planting beds (garlic, asparagus, and herbs), and our swimming pool, which has no separate fence of its own. The rest of the property outside the fenced acre is mostly given over to the pony's barn and pasture, trees for fort building, climbing and swings, and a sledding hill for winter fun. We absolutely love our chickens, and are having a total blast with them. Now the kids (meaning my husband and daughter) are all excited to hit our local Tractor Supply and get some ducklings. I'm game for it, and have no problem building them whatever they need, but I'm worried that ducks might not be a fit for this property. We can certainly get a handful of ducks, and easily build a small weather-proof shelter and sink a small pond for them. My question is, though, how do I keep them safe and out of trouble? If I put their house inside the fenced acre but without their own fenced area, I assume they'll be living in my swimming pool and eating everything out of my unfenced garden beds? We certainly have enough room to put them elsewhere on the property, but if I put their house and pond outside the fenced acre, I assume they'll be vulnerable to predators? Our chickens do well inside the fenced acre with a basic but roomy 3' fenced run just to keep them in one particular area during the day, but they have a rock solid coop they're locked up in at night. I worry about the ducks being housed outside the security of the fence, and not being locked in at night. Can I house the ducks in a modified version of the chicken set-up? That is, can I find another corner inside the fenced acre, build them a small shelter, sink a small pond by it, and 3' fence in a small run for them? Can they be locked in at night to protect against nocturnal predators? How many square feet should the shelter be per duck? How many square feet per duck for the outside run? Will a 3' fence keep them in? Any other options or ideas I should consider, or should I ditch the whole idea of keeping ducks altogether? Thanks in advance for any help-- it's much appreciated!