Sportdog Canine 12-Pack Athlete Liver Performance Pet Snack Bar Efficient Source Of Carbohydrates (Glycogen) Helps Sustain Normal Performance Works In Conjunction With A Dog'S Regular Diet To Help Maintain Normal Efficiency During Extended Exercise And Supports Your Dog'S Recovery No Artificial Preservatives; Organic And Natural Ingredients Readily Digestible Source Of Critical Nutrients Loaded With Quality Vitamins And Minerals To Lend Ongoing Support To Normal Metabolic Function