Fans flocked to Huntington Beach on Friday to watch top canine athletes compete in the Purina Pro Plan Incredible Dog Challenge surf contest. Dogs ranging from 2 to 13 years old — Corgis, Dalmatians, Pit Bulls, Labradors and more — showed off their skills riding waves, drawing cheers from beachside spectators as they aimed to “hang ten” and secure a spot in K9 surfing history.