Giant George, a nearly five-feet-tall Great Dane, has been deemed the world's tallest dog. His owner, Dave Nasser, has released a book about his experience with George titled "Giant George: Life with the World's Biggest Dog."

The Guiness Book of World Records has not only given George the title of the Tallest Living Dog, but has also named him the Tallest Dog Ever.

George weighs 230 pounds and eat 180 pounds of food a month. His daily diet consists of two cups of rice, one cup of dog food, three quarters of a cup of chicken and four or five tablespoons of yogurt.

He has to sleep on a queen-sized mattress in his Tuscon, Ariz., home, Nasser said.

Once the word got out about George, he was immediately recruited for various tv shows, but for Nasser, transporting the dog to the studios proved quite difficult.

According to The New York Daily News, George took up an entire row of five seats on the airplane when flying to appear on "Live! With Regis and Kelly."

Do you want to own one in your house? Besides that klind of George, there are other extreme dogs you can choose. Let's have a look at them.