Yogi the 10-year-old Yorkshire terrier is no ordinary pup—he's a train fanatic who delights his owner with his love of riding a miniature train. Wearing a train cap, this week's Newsweek Pet of the ...

You might also be interested in: Yorkshire Terrier: How This Breed Bonds with Owners, According to Experts These little guys are known for their small size, long hair, and being a mini or toy breed.