LOL! My dog, an Australian Shepherd/Border Collie, 70 pounds of gentle obedience, has killed and buried more than one duck in the back yard. I think he’s trying to save them for a rainy day.
They're expensive, so we use them in training until the dogs won't touch them. I actually saw one that was held together with duct tape . . . somebody said it was the first time they'd ever seen "duck tape" used for its intended purpose . . . whooweee those things get ripe!
The Geese Police use BCs and Aussies to scare Canadas off corporate lawns . . . . but usually they don't catch them. Labs of the hunting persuasion LIVE to catch ducks and geese. Hopefully they're dead when they get to them, but not always.