Our son David and his wife Lindsay are staying with us for a few days. They brought along their cat Olive Oil! She's a lot of fun. The unusual thing about her is that her front paws have two extra digits on them. Polydactyl cats like Olive are also known as Hemingway cats. Ernest Hemingway was once given a cat with six toes by a ship captain, and thereafter he was a lover of polydactyl cats. After Hemingway's death in 1961, his home in Key West was turned into a museum and a home for his cats.
Even though having extra digits is a congenital abnormality, it doesn't seem to bother Olive. She's really fast, so maybe the extra toes are a blessing in disguise.