Zeus, a Great Dane, is now officially the world's tallest dog according to Guinness World Records.  How tall is Zeus?Zeus is a three year old who lives in Michigan.  Just how tall is he?  When he's down on all fours he's 44 inches tall.   When he's standing on his hind legs, he measures in at 7 feet, 4 inches, taller than most NBA players!  Yao Ming is 7 feet, 6 inches!  His owner says Zeus is very laidback and gentle.  He works as a therapy dog and is comfortable around other animals.  Zeus eats a ton of food, and drinks from the kitchen faucet!  He sleeps on his owners bed, so no telling how much room he leaves for them on the bed.