Prozym Sticks Large Dog over Oral Care Clean Tartar Teeth a unique shape and active ingredient make these chews a powerful anti-tartar weapon. Dogs love the taste of these chews highly palatable. Your dog will enjoy chewing at the same time as cleaning its teeth and gums. The chew fights plaque, tartar and bad breath. Made to a low-fat formula. Unique Ergonomic Shape. The unique and ergonomic design of the star-shaped chew means that as the dog is chewing, there is greater contact between the chew and the dogs' teeth and gums, hence increasing the rubbing and cleaning action on the dogs' teeth and gums. Unique Active Ingredient. RF2 a key ingredient from plant origins. Acts against biofilm that is created by bacteria in the mouth biofilm are the first stage in the formation of dental plaque on teeth. Helps to restore bacterial balance in the mouth. Large sticks for dogs over 20kg.