Ami Sheffield and her dog Pixel, a miniature American shepherd, are serious competitors in the rapidly growing sport of agility. They have serious fun doing it, too. Ami and Pixel are reigning titleholders in the 12-inch division of Westminster Kennel Club Master’s Agility Championship (they’ve won back-to-back titles). Ami’s competed and won on the international level, too. We visit Ami and Pixel at their training grounds to learn more about this popular sport.