Because your dog's bad breath could be a sign of serious dental problems, the experts at Purina developed Purina® Dentalife® ActivFresh®, containing natural spirulina and honey, to help fight bad breath at its source rather than just covering it up. ActivFresh® is designed with the Dentalife® shape, size, and chewy, porous texture that is scientifically proven to reduce tartar build-up. Don't hide bad breath, fight it at it's source with ActivFresh®. Instead of simply masking bad breath, Purina® Dentalife® ActivFresh®, containing natural spirulina and honey, is designed to help neutralize the bacteria responsible for bad breath. ActivFresh® has the Dentalife® shape, size, and chewy, porous texture that is scientifically proven to reduce tartar build-up. Shape, size, and texture scientifically proven to help reduce tartar build-up and clean even hard to reach teeth. Made with natural ingredients *, and no added artificial flavourings or colourants. *Natural Ingredients