World's Toughest CatsThink your cat is tough? See how your kitty measures up to these kitties who competed in the World's Toughest Cat Contest run by British author Tom Cox.

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GREEBO

Kate Viscardi (greebo)'s Greebo won this year's top prize in Tom Cox's World's Toughest Cat Competition, which attracted more than 500 entries. (Click here to see our story.)