OneGREENIESDental Chew a day helps clean your dogs teeth by using his natural chewing action to wipe away plaque and tartar buildup from the surface of the teeth. The chewy and flexible texture allows teeth to sink in with every bite all the way to the gums for more effective cleaning. And GREENIESDental Chews have The Veterinary Oral Health Council (VOHC) Seal of Acceptance for plaque and tartar control.