polydactyl cat
Credit: http://en.wikipedia.org/wiki/File:Toes1.jpg
This image is originally part of the article How to Identify A Cat Breed Through Its Colors and Patterns
When your cat has six toes he is a polydactyl. This is a genetic mutation, and once it goes into a blood line, it stays. When polydactyls start to appear in any geographic area of the country, they'll proliferate and turn ordinary.
