There's about a three feet difference in size between the world's tallest and smallest dogs, according to Guinness World ...

Reggie, a 7-year-old Great Dane who stands at a staggering 3 feet 4 inches, and Pearl, a 4-year-old Chihuahua who measures in ...

When both dogs are walking, Pearl, a 9.14-centimeter (3.6-inch) tall chihuahua, barely reaches the top of Reggie’s paw, such ...