The World Largest DOG (Hercules )

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.  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.

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