To find the most popular dog of 2010, you could try these resources:
* American Kennel Club (AKC): The AKC publishes annual lists of the most popular dog breeds in the United States. You can likely find the 2010 list on their website or in their archives.
* Other Kennel Clubs: Other kennel clubs around the world, such as the Kennel Club (UK) or the Canadian Kennel Club, may have similar lists for the year 2010.
* Online Pet Resources: Websites like Petfinder or Dogtime often track dog breed popularity trends.
Good luck in your search!