When you think of working dogs, images of big Golden Retrievers or tall German Shepherds probably come to mind. But just because Lucy the Yorkshire Terrier is a mere 2.5 pounds and less than 6 inches tall doesn’t mean she can’t be part of the canine working class. In fact, Lucy is making her mark, not just as a hardworking therapy dog, but also as the world’s smallest working dog, according to Guinness World Records.

http://www.pawnation.com/2013/05/06/yorkie-sets-record-for-smallest-working-dog/