Don't hide bad breath, tackle it! Start now with your easy and effective dental routine with just 1 stick a day! Because your dog's bad breath can be a sign of serious dental problems, Purina experts developed Purina Dentalife ActivFresh, which contains natural spirulina and honey, to help combat bad breath at its source rather than just masking it. ActivFresh is designed with the shape, size, and chewy, porous texture of Dentalife, which is scientifically proven to reduce tartar buildup.