The U.S. pet overweight and obesity rate for dogs and cats is more than 50%. In Animal Planet's new series , pet expert and trainer Travis Brorsen begins a four-month long weight-loss and behavior modification journey with pet owners and their overweight animals with the aim of helping each pet live a healthier and happier life. Each story ends with Brorsen returning for a final weigh-in to see just how far the pets and pet owners have come.