Chihuahuas are named for the Mexican state of Chihuahua, and the AKC registered its first one in 1904. Most adoptable Chihuahuas weigh between 3 and 9 pounds, with an apple-shaped head, large upright ears and either a smooth or long coat in nearly any color. Pet Chihuahuas often run heavier than the show standard.
The personality is large for the size. Many Chihuahuas attach closely to one or two people, bark at anything new and act wary around strangers, though each dog varies. In Frederick, that tends to suit adult households or homes with older, gentle children, where someone is around for much of the day. Chihuahuas are among the most common small dogs in shelters, and adults of every age and temperament are often waiting for homes.