ProDen PlaqueOff System Crunchy Dental Bones help prevent plaque formation. The natural chewing action helps to remove plaque & tartar, and freshen breath. The results - in the form of visibly whiter, cleaner teeth, and fresher breath - are usually seen in three to eight weeks with continued use. This completely natural product is made from seaweed and can complement regular dental hygiene. ProDen PlaqueOff System Crunchy Dental Bites are a perfect treat for the health-conscious pet owner.