Hank is helping the cowboys with the dangerous mission of rounding up a very angry bull when a strange twist of events brings a yellow Labrador onto the scene. The entire ranch quickly becomes enamored with this new addition to the ranch's Security Division. Who wouldn't love a good-natured dog who strikes fear into the hearts of angry bovine, wears a big sloppy grin all day, and adores the ranch kids? Where will Hank fit in now that there is a Perfect Dog on the scene?

Hank sings a little thing called "Happy Dog," and the yellow Labrador sings his story in "Happy's Confession."