Small toy spaniels like those in portraits of England's King Charles II inspired this breed's revival in the 1920s, when an American enthusiast offered a prize for dogs with the longer noses of that era rather than the flat faces then in fashion. Britain recognized the Cavalier as its own breed in 1944, and the American Kennel Club followed in 1995. Cavaliers weigh about 13 to 18 pounds, with large dark eyes, long feathered ears and a silky coat in Blenheim, tricolor, ruby or black and tan.
Many Cavaliers are gentle, affectionate and adaptable, equally happy on a lap or a long walk, and they often get along with children, other dogs and cats. Their sweetness comes with significant health concerns: nearly all develop mitral valve heart disease eventually, and many have a skull malformation linked to syringomyelia, so veterinary costs deserve careful planning.