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. Zodiac Flea & Tick Spray for Dogs & Cats kills adult fleas and ticks and contains Precor Insect Growth Regulator which effectively breaks the flea life cycle and prevents the growth of the pre-adult stages of the flea. 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 Available Size: 236 ml