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. Cavalier King Charles Spaniel, Blenheim variety, with chestnut brown markings on a white background on its back, patches over eyes and all brown ears.