Ultrum Ultimate Flea Spray is a wonderfully crafted flea and tick treatment for dogs. This fast-acting spray formula eliminates all the existing fleas within 24 hours. Ultrum provides protection against fleas for 3 whole weeks. It is also capable of destroying flea eggs and larvae for over 3 months. Manufactured by Kyron Labs, this ultimate and long-lasting spray is made up of key ingredients such as Permethrin, Ex-bioallethrin, Pyriproxifen and Piperonyl Butoxide. Moreover, this spray is safe to use on puppies above 7 weeks of age.