Worm Free Naturally is a natural dewormer for cats, dogs and horses that works mechanically, not chemically, to microscopically abrade the outer coating of parasites, causing dehydration, or loss of body fluid, which is fatal. And because it"s not a chemical, but a natural wormer, parasites don"t build up an immunity. Rotating wormers becomes unnecessary, saving you time and money. It also contains trace minerals and pro biotics thatare an integral part of a healthy digestive system. Feeding Instructions for Cats,Mix Well With FoodCats 1 teaspoon daily Kittens 1/4 teaspoon daily