Morristown, Arizona, U.S. Tardar Sauce (April 4, 2012 – May 14, 2019), nicknamed Grumpy Cat, was an American Internet celebrity cat. She was known for her permanently "grumpy" facial appearance, which was caused by an underbite and feline dwarfism.

What condition did grumpy cat have?

Grumpy Cat, whose real name was “Tardar Sauce,” died peacefully at home after contracting a urinary tract infection, her family announced on Instagram in May. The cat curmudgeon captivated millions of internet users with her iconic frown, which was likely due to feline dwarfism.

Did grumpy cat have Down syndrome?

In fact, Grumpy Cat's real name was Tardar Sauce, and she wasn't really frowning or grumpy all the time. Instead, her dour expression was caused by a combination of an underbite and feline dwarfism, the latter of which is the result of a genetic mutation that can lead to growth problems and abnormal body proportions.