Labrador retrievers are still tugging hardest on U.S. dog lovers' heartstrings, but poodles just strutted back into the American Kennel Club's top five most popular dog breeds for the first time in nearly a quarter-century.
The club's annual popularity rankings come out Tuesday, drawn from more than 800,000 purebred puppies and older pooches that joined the nation's oldest canine registry last year.
