Vet's Best Anti-Flea Spray Shampoo is an easy and quick way to kill fleas on your dog while bathing. The formula cleanses and deodorizes your dog's coat, too! A unique blend of peppermint oil and eugenol (from clove plants) is used to kill fleas hiding in your dog's coat. This formula is independently tested and proven effective at killing fleas. It is for use on dogs and puppies 12 weeks or older when used as directed. For over 30 years, Vet's Best has blended plant-based ingredients that work together to comfort and protect your pet.