The Biggest Dog ~ According To Guiness World Records ~

The biggest Dog Ever According to Guiness World Records. Hercules was recently awarded the honorable distinction of worlds Biggest Dog by Guinness World Records. Hercules is an English Mastiff and has a 38 inch neck and weighs 282 pounds. With " paws the size of Softballs" (reports the boston Herald), the three-year-old monster is far larger and heavier than his breed's standard 200lb limit.