Chihuahua (dog) Chihuahua (dog) The Chihuahua () is the smallest breed of dog and is named after the state of Chihuahua in Mexico. Chihuahuas come in a wide variety of colors, and two coat lengths. The Chihuahua's history is convoluted, and many theories surround the origin of the breed. Both folklore and archaeological finds show that the breed has origins in Mexico. The most common theory is that Chihuahua are descended from the Techichi, a companion dog favored by the Toltec civilization in Mexico. No records of the Techichi are available before the 9th century, although dog pots from Colima, Mexico, buried
Breed club (dog) of breeding stock (although the dogs must not vary too much in appearance from the breed standard, or they will not be registerable.). The emphasis is placed on hunting ability in the selection of breeding stock. In addition, inbreeding may be regulated. The Jack Russell Terrier Club of America code of ethics specifies that "a terrier will be rejected for registration if the inbreeding coefficient is more than 16 percent" in an effort to lessen hereditary disease in the breed. Independent working and hunting breed clubs sometimes maintain an open stud book. Dog breeds that are primarily kept as pets