How about this little guy?

Hercules: The World's Biggest Dog Ever According to Guinness World Records

Hercules was recently awarded the honorable distinction of Worlds Biggest Dog by Guinness World Records. Hercules is an English Mastiff and who 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. Hercules owner Mr. Flynn says that Hercules weight is natural and not induced by a bizarre diet: "I fed him normal food and he just "grew" .. and grew. and grew. and grew. Hercules' sheer volume may have won him the Largest Dog world record, but the Heaviest Dog title still rests with Kell who weighed in at 286 pounds in August of 1999. This English Mastiff, however, only has a 32-inch neck - far less than Hercules' 38-incher. Think about that for a second though - 32 inches is a standard waist size for a man! Proud owner Tom Scott said Kell is two years old and is expected to continue to grow for the next two years. Kell needs to be fed 100lb of beef every week, and drinks gallons of goats' milk to stay healthy...