This formula helps kill flea eggs for up to 4 weeks to help rid your cat or kitten of unwanted pests before they hatch. Help put an end to the flea life cycle when you use this ZODIAC SPOT ON Flea Control for Cats & Kittens. The formula helps kill flea eggs living in your feline's fur for up to 4 weeks and contains Precor® insect growth regulator to help prevent pre-adult fleas from maturing. For cats and kittens 12 weeks of age and older Helps kill flea eggs before they hatch to protect against flea infestation for up to 4 weeks Contains Precor insect growth regulator to help prevent flea eggs and larvae from maturing into adult fleas Natural motion helps spread the formula over your cat's body Monthly treatment offers convenience Bend at perforation and tear off 1 applicator Hold applicator and bend numbered area of plastic at perforation, tear off and discard Hold applicator upright away from your face and body and use scissors to cut secure seal applicator tip Gently lift your cat's coat on the back of the neck at the base of the skull, position the tip of the applicator on your cat's exposed skin and squeeze out the entire contents of the applicator onto the skin Active ingredient: (s)-methoprene 3.6% Keep out of reach of children. Read the entire label before using this product. Do not administer by mouth. Consult a veterinarian before using on sick, aged, pregnant or nursing cats or cats receiving drug or other pesticide treatment. If signs of sensitivity occur, bathe your pet with mild soap and rinse with large amounts of water; if signs continue, consult your veterinarian immediately. Available in a 4-pack of 0.03-fl. oz. (1 mL) doses