Rashes is a shelter dog that Stan allows Francine to adopt when he performs good deeds when he sleepwalks in "Cock of the Sleepwalk". Rashes' name becomes apparent when he sticks his hindquarters in Stan's face.
Stan ditches the dog at what he first describes a a new home, but eventually reveals it to have been a Korean BBQ restaurant. When Stan decides the best way to defeat his "good" self is to place everything his good side loves in harm's way, he goes back to the Korean restaurant and is directed to the stove. Stan is horrified for a moment until he discovers that Rashes is now employed as a cook.