Meet Toby Keith. Guinness says he is the world's oldest dog at age 21

TobyKeith is a dog. No really, he is—a 21 year old chihuahua now verified the oldest living dog on Earth, according to Guinness World Records. He was surrendered by his original owners when he was just a few months old. Gisela Shore was volunteering at a West Palm Beach animal shelter when she heard the dog’s story and brought him home. She changed his name from Peanut Butter to TobyKeith, and he’s been her companion for over two decades.