Chihuahuas take their name from the Mexican state of Chihuahua and are among the smallest dogs in the world, usually 3 to 9 pounds, with a rounded apple-shaped head and big upright ears. They come in smooth and long coats and nearly any color, and either coat needs only light brushing. Pet Chihuahuas are often larger than the show standard, and size isn't always predictable.
Personality runs bold. Many are devoted to one or two people, bark at visitors and hallway noises, and act far bigger than they are. Rough handling can lead to snapping, so gentle socialization matters. With a typical lifespan of 12 to 16 years, adopting one is a long commitment, and adult dogs of every temperament are often a good match for a calm household.