Frontline Spray for Dogs & Cats can be applied directly for both immediate and long-lasting control of fleas and ticks for up to 30 days. This effective spray contains fipronil to kill existing flea and tick infestations. It also kills fleas before they lay eggs, effectively preventing reinfestation. Safe for puppies and kittens 8 weeks of age or older, Frontline Spray helps reduce flea and tick infestations in multi-pet households, and is great for the initial treatment of flea allergy dermatitis. The spray bottle is easy to use, provides fast and even application and can be reapplied regularly.