The Proden PlaqueOff Cat Feline Formulation for Bad Breath, Plaque and Tartar will keep your furry friend's oral health in great condition. It is clinically-proven to control tartar and plaque build-up as well as combat bad breath. It is a natural food supplement that contains brewers yeast and is specifically-designed to appeal to a cats' palate. The Proden PlaqueOff Cat Feline Formulation for Bad Breath, Plaque and Tartar can be used for up to 12 months.