Nation The world’s oldest living dog, a chihuahua named Spike, takes Guinness World Record January 19, 2023 Natalie Neysa Alund, USA TODAY Comments Off on The world’s oldest living dog, a chihuahua named Spike, takes Guinness World Record The world's oldest living dog is Spike, a 23-year-old chihuahua mix from Camden, Ohio who loves crunched up Doritos, walks and Saturday baths.