I'm thinking that with 15 .32 caliber pellets you'd at least blind or stun the wretched thing. Especially if you give him 2 or three rounds.

That being said the worst thing that ever came after me was good old #5... (freshly calved cow, in the dark, in the fog: ran for my life over the frozen lumps of cow poop. We came to an understanding the next morning though...)