George the blue Great Dane is the largest dog in the world. George is 7 feet, 3 inches long, 43 inches tall at the shoulder, and weighs in at 245 pounds! David and Christine Nasser feed George 110 pounds of dog food a month, he sleeps in his very own Queen-sized bed. David and Christine have had George since he was a 7 weeks old puppy.
Update – 14/09/2012
Guinness announces the Worlds Tallest Dog – Zues – 44″ at the shoulder.