Pedigree DentaStix reduce tartar build-up by up to 80% when fed daily through a combination of special texture and active ingredients. They have a unique X shape and, when fed daily, its special texture is scientifically proven to help reduce the build-up of tartar by up to 80%. Pedigree DentaStix contain two active ingredients (sodium tripolyphosphate and zinc sulphate), which bond with the calcium in saliva and slow down the build-up of tartar. This helps plaque stays softer for longer and makes it easier to remove by chewing. Pedigree DentaStix suit large dogs and as well as being tasty, a large stick contains just 124 calories and there is no added sugar.