Reggie, a 7-year-old Great Dane from Idaho, and Pearl, a 4-year-old Chihuahua from Florida, put their (size) differences ...

Size differences didn't cause any issues when the world's tallest and smallest dogs met up for a playdate last month ...

Guinness World Records organized a meeting between the world's tallest and shortest dogs in April in celebration of the brand's 70th anniversary ...