Hong Dong is an 81-kilogram puppy presumably with the same bad breath, flea and flatulence problems as every other dog. So what makes this bundle of fluffy, red fur worth $1.5 million? Hong Dong, whose name means Big Splash, was recently purchased by a multimillionaire coal baron from the north of China."You're not allowed to see the puppies until you tell them how much you've got to spend," Tibetan mastiffs are believed to be one of the world's oldest breeds. They were originally used as guard dogs for monasteries and Genghis Khan is said to have had an army of them. They can live for 10 to 14 years.Tibetan mastiff named Red Lion was sold last year for £915,000 ($1.48 million).