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Frontline Spray provides effective flea and tick control for dogs/cats and puppies/kittens as young as a day old. The spray formulation ensures that fipronil, the active ingredient, is immediately distributed over your dog or cats body, killing fleas shortly after application. Control is long lasting, and can also be used with complete peace of mind on pregnant and lactating pets. Repeat treatment monthly. Bathing or shampooing your dog 3 days before or 3 days after the application is not recommended as this will decrease the duration of activity.