Ultra Flea and Tick Protection for Small Dogs (4-10 lbs) contains the same active ingredients as K9 Advantix II for Dogs. This waterproof, fast-acting formula kills and repels fleas, tick, and mosquitoes, all while breaking the flea life cycle by killing flea eggs, flea larvae, and chewing lice for up to 30 days. Ultra for Dogs is not manufactured or distributed by Bayer Healthcare LLC, the makers of K9 Advantix II. K9 Advantix II is a registered trademark of Bayer Healthcare LLC.

• Contains the same active ingredients as K9 Advantix II for Dogs (imidacloprid, permethrin & pyriproxyfen).
• Effectively breaks the flea life cycle by killing all life stages of fleas: adults, eggs, and larvae to help prevent reinfestation.
• Flea treatment remains effective and provides protection even if your pet gets wet (24 hours after application).
• 5 WAY PROTECTION FOR DOGS: Ultra for Dogs provides 5 way protection against fleas, ticks, biting flies, mosquitoes and lice
• WATERPROOF, FRAGRANCE-FREE FORMULA: Flea medication remains effective & provides protection even if your pet gets wet