No good deed goes unpunished
Or, in this case, no goose deed goose unpunished. As it turns out, comradeship between animals is a real thing. They say that when you feed a stray cat or a stray duck, apparently, he’ll never leave your side and he’ll come back with friends, and now we know this isn’t a myth. When you feed a stray animal, they always come back for more.
Feeding one duck is one thing, but feeding 19 ducks is a serious business. Next thing you know, they start coming up with demands; this one doesn’t eat that, the other one doesn’t eat that, and before they know it, this family is taking care of 19 ducks. That’s what happens when you try to do a good deed.