I know most of you have way more ducks than I will. We have our indoor cats 'chipped just in case they get out, and was wondering if it were feasible to do it with ducks. I will be getting Swedish ducks (3-5) so I doubt they would fly out of the yard, but you never know when a two-legged predator might happen by. Our ducks will be in the backyard that is fully enclosed by a 6-foot wood fence, at night they will be in a predator proof pen. I've heard some ducks can be escape artists, we're taking a good look at the perimeter of the yard to see where a duck of any size might get out.