Nulo Trainers Duck Recipe for Dogs 4 oz offers a practical dog treat option for pet parents. Hard work needs the proper reward, and our duck training treats are just that. These protein-rich 2-calorie treats work for sensitive stomachs and picky eaters alike. Use them during a training session or sprinkle over dinner for the ultimate reward. Shop Nulo Trainers Duck Recipe for Dogs 4 oz and other dog treat options at Uncle Bill's Pet Centers. Uncle Bill's Pet Centers helps Indiana pet parents find trusted pet supplies, food, treats, toys, grooming essentials, and everyday care products for dogs and cats.