Chihuahuas are named for the Mexican state of Chihuahua, and the AKC registered its first one in 1904. Adoptable dogs often weigh more than the six-pound show limit, with 3 to 9 pounds typical, and they come in a smooth or long coat in nearly any color. The rounded head, big upright ears and watchful expression are the giveaways.
Many Chihuahuas are devoted to one or two people, confident well beyond their size and wary of strangers, though every dog varies. Barking, snapping when handled roughly and slow house-training are common, so patience and gentle socialization matter. In Allentown, where so many homes share walls, early quiet training keeps neighbors happy. With lifespans of 12 to 16 years, adopting one is a long commitment.