Boo Boo was the world's smallest dog from 2007 to 2013. She stood at a height of according to the Guinness Book of World Records.
Boo Boo was replaced as the World's Smallest Dog by Milly, another Chihuahua who stood at . Other contenders for the record included Beyoncé, a Dachshund-Chihuahua mix, and Scooter, a Maltese.
See also List of individual dogs
References