I incubated some eggs with my elementary schoolers and was shocked to end up with ducks! They're really entertaining but they're getting big enough that I need to figure out how to house them. My backyard is small (5 feet to the wall on the sides and 10 feet to the wall at the back) and completely unlandscaped so I don't really mind if they just wander around back there. My question is is that safe? I live in the suburbs of Phoenix, AZ and the only predator like animal around here is my neighbor's car. Do I need a full duck run or can I just let them run around out there?