10 The breed also is officially divided into the two basic groupings of smooth-coat (i.e., short hair) and long-coat. Some believe the long-coat variety comes from interbreeding with Yorkies.
11 The American Kennel Club first recognized the Chihuahua in 1904, just 20 years after the organization was established. That makes the Chihuahua one of the AKC's earliest registered breeds. The AKC categorizes Chihuahuas in the toy group.
12 Despite the breed's long history, it has never won Best in Show at the AKC-sanctioned Westminster Kennel Club Dog Show.