The quickest way to kill fleas and ticks is to expose them to a wet product such as a shampoo that is applied directly to the animal's entire coat, penetrating to the skin. Zodiac Flea & Tick Shampoo for Dogs and Cats kills adult fleas and ticks while cleaning & conditioning the hair with a pleasant scent and gentle alcohol free formula. Bathing will quickly kill fleas, while removing flea dirt or waste product.