Kong Stuff'n Liver Paste and Peanut Butter Paste makes filling your dog's favorite Kong dog treat dispenser easy. Apply a small amount of Liver paste or Peanut Butter paste to the inside of a Kong dog toy or the Denta-Ridges of a Kong Dental toy and watch as your dog stays happy and entertained. Kong Stuff'n Peanut Butter paste and Liver paste contains no trans fatty acids and are less than 17 calories per teaspoon.