Once-a-month Flavor Tabs to prevent heartworm disease, control adult hookworm infection and remove and control adult roundworms and whipworms in dogs and puppies 4 weeks of age or older and 2 pounds of body weight or greater, and to prevent heartworm disease and remove adult hookworms and roundworms in cats and kittens 6 weeks of age or older and 1.5 pounds body weight or greater. Eliminates the tissue stage of heartworm larvae. Safely tested in over 75 breeds of dogs, including collies, pregnant females, breeding males and females and over 8 different breeds of cats.