CAVALIER KING CHARLES SPANIEL. The Cavalier King Charles Spaniel is an elegant, energetic toy breed that is compatible for city or country life. Successful in conformation shows, obedience and agility, they also make wonderful therapy dogs due to their sweet, gentle natures. For centuries, the Cavalier King Charles Spaniel (a namesake of King Charles II of Britain) has been recorded in paintings and tapestries together with their aristocratic families. It is obvious from these works of art that Cavaliers were a luxury item and lived "the easy life" as house pets. Though used successfully for shooting small game, the Cavalier’s true purpose has always been that of companion.