1. Grumpy Cat
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Hands down, Grumpy Cat is the cash cow of modern pets. She is that unhappy-looking cat you see in oh so many internet memes. And her owner, Tabatha Bundesen, has taken that dour expression and parlayed it into so much more with merchandising and sponsorship deals aplenty.
In 2014, news reports surfaced that Grumpy Cat (who goes by the name Tardar Sauce in her private life) had made her owner nearly $100 million. Bundesen denied those claims, but since you can get everything from Grumpy Cat calendars to Grumpy Cat PJs, we’re sure she’s not hurting for money.