The world’s most expensive dog cost $582,000 A Tibetan Mastiff now holds the title after being sold to a woman in China <a href="http://today.msnbc.msn.com/id/32797517/ns/today-today_pets_and_animals/?gt1=43001" rel="nofollow" target="_blank">http://today.msnbc.msn.com/id/32797517/ns/today-today_pets_and_animals/?gt1=43001</a>