Her DNA tests listed Cattle Dog, Treeing Walker Coonhound and Chihuahua. “Treeing Walker Coonhounds are 70 pound, but it’s the Chihuahua in her that’s making her small,” Olafsoon said.

According to the Guinness World Records, some of the oldest living dog breeds include Chihuahua, and Chihuahua Crossbreed, Fox Terrier, and Australian Cattle Dog. A couple of these appear on our ...