Approximately one in every 20 female dogs is born with an eleventh nipple. These dogs are known by the AKC as “Skippies,” after the Frenchman who first selectively bred for the genetic mutation in the early 1600’s.

This trait is seen as either an asset or a defect depending on the breed. For example, in beagles it is desirable that a bitch be a skippy due to their large litters, sometimes up to 19 pups; however a skippy bitch Rhodesian ridgeback may be disqualified in conformation competitions because they have just one puppy at a time.

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