Ep 5. Savage Blood

This is an anime-original episode. In a small town in Colorado, Sam and Dean investigate a series of cattle mutilations, the beasts have been drained of their blood. They run across Jason, a hunter who specializes in vampires, but wonder why he's in town. Dean takes a shine to a wimpy kid, Ryan. But the kid and his father are hiding something. It's revealed Jason is in town to kill them. They're both vampires who have sworn off killing humans. Can Sam and Dean save two monsters that they are trained to hunt and gank?!