ProDen PlaqueOff® Dental Bones are dog chews with the PlaqueOff System® which help clean plaque and tartar by abrasive action. Used daily, this natural product made with sea kelp can complement ordinary dental hygiene. ProDen PlaqueOff® System Dental Care Bones help prevent plaque formation. The bone’s unique shape and abrasive action helps to remove plaque and tartar, helping to freshen breath. Features: *Grain Free – Gluten Free – Soy Free – Rich in Omega Fatty Acids. *Made in the USA with ingredients primarily sourced from the USA unless not available. No ingredients from China.