Nation The world’s oldest living dog, a chihuahua named Spike, takes Guinness World Record January 19, 2023January 19, 2023Natalie Neysa Alund, USA TODAYComments 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.