What breed of dog is the most spoiled in the U.S.? The state of Washington? We have the answer. Now, here comes the science! The dog and cat loving folks at Yappy.com studied 300 popular dog breeds and over 450,000 individual dog profiles to determine the most spoiled breed of dog that gets the "ulti-mutt" treatment by individual states as well as the top dog across the entire United States "pup-ulation". After collecting their data, they determined that the Dobermann is " the most spoiled dog breed in the US and the most likely to be lavished with treats by their adoring owners."