Wolf, Wolf, Goose

The last time I was at the Foreign Service Institute, the State Department's training facility, there were geese everywhere, especially outside the buildings. They were so omnipresent that "husa" is the Czech word most indelibly imprinted upon my memory, except for "pivo." The funny thing about a campus with dozens of geese - there is also goose shit everywhere.
Well, no more. Scattered across the campus are cardboard cutouts of wolves (or maybe coyotes, I am told, but first, who cares?, and second, what's the difference?). And the geese stay away. And there are remarkably few goose droppings, at least near the doors where the wolves are.
There's got to be a parallel here I can use against my neighbors; I'm really getting tired of their crapping in my yard.