Eight fat dogs and their equally overweight owners take on a joint diet and exercise regime in the ultimate weight loss contest. Julian Bennett introduces the dogs to the sport of canine cross-country running. Used as a training technique for huskies, it's going to be tough for all concerned. But events take a surprising turn when one contestant's shock announcement has implications for the remaining pairs in the weigh-off - rottweiler Benson has a cold and has been excused from proceedings.