C.E.T. Chews size 5" to 8" in length are beefhide treats to which an enzyme has been added that helps stop plaque from forming, and the natural abrasion of rawhide chews help clean your dogs teeth. CET Chews of this size strips make them more suitable for large breeds. Chews help to keep breath fresh and teeth clean. Use C.E.T. Chews daily as first step toward oral hygiene or on those days when brushing isn't possible.