“C.E.T. Enzymatic Oral Hygiene Chews for Dogs, featuring the exclusive Dual-Enzyme System, are made from select beefhide to combine a natural antiseptic plus an abrasive texture that works with the dog's chewing action to loosen tartar and provide clinically proven plaque control. Helps clean teeth and freshen breath even when brushing isn’t possible. These chewy strips work like rawhide pieces to help your dog exercise his natural need to chew. They also prevent excess stress on the teeth and gums.HEXtra Premium Chews can only be achieved by adequate chewing action. Gulping whole chews will reduce the efficacy and can be harmful to your dog. this product is intended for intermittent or supplemental feeding only.”