A Chihauhau (overgrown rat) used to live over the road from Parents and would constantly yap at all and sundry. Our dog Ben, a Lab cross, tolerated the overgrown rats presence on his patch until one night, when out for his constituional, the rat challanged him, and commenced yapping. Displaying great skill Ben turned and pee'd over the rat with a look that said "did someone speak".The rat became something of a recluse for some time.
We lost Ben some time ago but I still miss him.