The Cavalier King Charles Spaniel is a small breed of spaniel classed in the toy group of The Kennel Club, The Canadian Kennel Club and the American Kennel Club, that originated in the United Kingdom. Since 2000, it has grown in popularity in Canada and the United States and ranks as the 19th most popular pure-breed in Canada and the United States. It has a silky, smooth coat and commonly a smooth undocked tail. The breed standard recognizes four colors: Blenheim (chestnut and white), tricolor (black/white/tan), black and tan, and ruby. The breed is generally friendly, affectionate and good with both children and other animals; however, they require much human interaction. Since they are family dogs, it is recommended to not leave one alone for long periods at a time. The expected average lifespan of a Cavalier King Charles Spaniel is between nine and fourteen years.