六趾猫, or "polydactyl cats," are cats that have more than the usual number of toes on their paws. Typically, cats have five toes on their front paws and four on their back paws. However, 六趾猫 can have six or even more toes, which can give them a unique appearance and enhanced grip. This genetic trait is caused by a mutation in a specific gene. 六趾猫 are often associated with famous figures like Ernest Hemingway, who had a fondness for these cats at his home in Key West. Their extra toes can make them excellent climbers and hunters, adding to their charm.