Zodiac Flea & Tick Spray for Dogs and Cats kills adult fleas and ticks fast. It also kills American dog and Brown dog ticks. The quickest way to kill a flea and tick is to expose them directly to a wet insecticide product. Zodiac Flea & Tick Spray is applied directly to your pet's coat, penetrating to the skin where fleas and ticks are usually found. One treatment controls adult fleas and ticks and prevents flea eggs from hatching for up to 2 months. Application once a month should be adequate given the residual control. For severe flea problems, treatments can be performed weekly.The quickest way to kill a flea and tick is to expose them directly to a wet insecticide product such as a pet shampoo or spray that is applied directly to the animal's entire coat, penetrating to the skin, where fleas and ticks are usually found. Kills adult fleas and ticks Also kills American Dog and Brown Dog Ticks Prevents flea eggs from hatching for up to 2 months One treatment controls adult fleas and ticks Use once every 2 months should be adequate (in exceptional circumstances, retreatment may be increased to once per week) Precor® (I.G.R.) is unaffected by regular bathing or swimming