Fenrir, a domestic Savannah cat, was named the tallest living cat by the Guinness World Records, measuring in at almost 20 inches.

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He likes treats, he helps patients relax at the doctor's office, and now he's the world's tallest living domestic cat. Fenrir Antares Powers, a 2-two-year-old Savannah cat, measured 18.83 inches on Jan. 29, 2021. His record was published in the Guinness World Records 2023 edition.

Savannah cats like Fenrir are crosses between domestic cats and large-eared wild African cats, according to the International Cat Association. The cross gained popularity in the 1990s, and in 2001, the association accepted Savannahs as a registered breed. Fenrir's owner is Michigan physician and HIV specialist Will Powers, the website said. Powers adopted Fenrir when Fenrir was just 12 weeks old. "He just grew and grew like Clifford the Big Red Dog," Powers said in a video about the kitty.

Fenrir, who Powers lovingly calls "Fen," is friendly and outgoing. He also loves helping out at Powers' office to calm anxiety-ridden and stressed patients. He's also "ravenously" hungry and has seen his diet limited because he's getting too big, Powers said in a video.

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