Boo Boo (dog)
Boo Boo is the world's smallest dog by height at 9.65 cm, according to the Guinness Book of World Records.
Boo Boo faces competition from Milly, another Chihuahua and Beyonce, a Dachshund-Chihuahua mix but they can not be considered until they are one year old. Boo Boo weathered a challenge from Scooter, a Maltese
