Often a runner-up in the Guinness Book of World Records, the Irish Wolfhound comes in second in comparison to the Great Dane.

These dogs hold the respective Guinness World Record for the tallest and shortest living dogs in the world. See the cute ...

The pooch named Major, is reportedly awaiting judgement from the Guinness World Records which is due next month as it runs for the spot of the largest dog in the world. Julie and Brian Wiliams with ...

Did you know that the American Molossus Dog is the largest dog in the world? You're about to find out! In this video, we're ...

A playdate between the world's tallest and smallest living dogs went the way of most dog park encounters despite the 3-foot height difference — lots of tail wagging, sniffing and scampering. Reginald, ...