The Beauceron is a large sheepdog breed that originated in France, dating back to the 1500s. These stunning pups have double dewclaws, which means a pair of independent "thumbs" on their rear legs. AOL: The Dog Breed Famous for Its “Double Dewclaws” Was Built for the Mountains At first glance, the extra toes might look like a genetic quirk—or even a mistake.

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But for one powerful working breed, those unusual double dewclaws on the rear legs are no accident at all. They’re a ... The Dog Breed Famous for Its “Double Dewclaws” Was Built for the Mountains Find cats & dogs for adoption today! Through the Petco Foundation, we have helped over 5 million pets find new homes all across the country.

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