History and Origins
A small dog, called a Techichi, was an important part of Toltec and Aztec cultures. Techichi were the pets of the wealthy and were cremated with the dead in order to take on the deceased's sins so that the person could enter the next world without angering the gods. The dogs were also supposed to guide the deceased through the underworld and fight off evil spirits. Some believe that the Chihuahua is the product of breeding between the Techichi and a small, hairless dog from Asia.
The Chihuahua is a state in Mexico and it’s from this state that the modern Chihuahua dog breed was first exported to America. Theory has it that the modern breed developed from the ancient strains of the Techichi, mixed with small dogs of Mexico, Arizona and Texas.