13. Cavalier King Charles Spaniel
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The Cavalier King is the smallest among Spaniels. This is a small-sized breed that is gentle and loving towards everyone, especially the owner. It is the perfect companion dog that loves exploring, hiking and other sport activities, but also will be there for you on quiet cuddle up nights. It is a beautiful breed that will win you over with tender eyes. The most common colors for the Cavalier King are Blenheim, black, tan, ruby, and tricolor. Their general health is pretty good, although they are predisposed to gaining weight if not exercised enough. Overall, they are an ideal pick for active people.