A single dose of CAPACTION tablets should kill the adult fleas on your pet. If your pet gets re-infested with fleas, you can safely give another dose as often as once per day. CAPACTION is safe for dogs, puppies, cats, and kittens 2 pounds of body weight or greater and 4 weeks of age or older. CapAction Fast Acting Flea Treatment for Small Dogs and Cats, 6 Tablets: