When Courtney Dasher adopted a funny-looking, rescue dog, she had no idea that her beloved pet would become a high-earning, jet-setting internet star.
Tuna, a five-year-old chiweenie (a cross between a dachshund and a chihuahua), had been found abandoned on the side of a road in San Diego, southern California.
With a pronounced overbite, and goofy teeth that stick out, Tuna somewhat resembles a cartoon character. Ms Dasher thinks that he looks like Montgomery Burns from The Simpsons.
As a proud "mum" to Tuna, in November 2011 Ms Dasher started to upload photos of the chiweenie to her account on picture-sharing social network Instagram.