The sample size was small (just over 700 pups out of the 65 million pet dogs in the U.S.), but only 66% of small breeds were housetrained, compared to 95% of large breeds.

It's small in stature, big on activity and known for a "smile," and it's ready to compete with 200 other dog breeds. Say hello to the Lancashire heeler, the latest breed recognized by the American ...

Reggie, the tallest dog alive, sniffs the head of Pearl, the world's smallest dog alive. @guinnessworldrecords via Instagram Reggie’s owner, Sam Johnson Reiss, agreed the day was a huge success.