Claim to fame: The world's smallest dog

Size: 4"

Measuring a miniature 4" (or 10cm) the world's smallest dog, Boo Boo, got a little hot under the collar when he was put face-to-face with the world's tallest pooch, Gibson, a giant Harlequin Great Dane for a Guinness World Records photoshoot.

Gibson stands 42" (or 1.07 metres) high in comparison to the long haired, yet short bodied chihuahua.