K9 Advantix flea, tick & mosquito protection on Weimaraner

Does your flea and tick treatment require a bite?

When fleas, ticks and mosquitoes bite your dog, they can cause irritation and transmit deadly diseases. But not all products work the same.
K9 Advantix® II kills fleas, ticks AND mosquitoes through contact. No biting required. Now that's a wise choice.

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No biting required.

Veterinarian-recommended K9 Advantix® II kills fleas, ticks, mosquitoes and lice, and repels biting flies. And because it works through contact, there’s no biting required.

K9 Advantix® II kills and repels fleas FLEAS
K9 Advantix® II kills and repels ticks TICKS
K9 Advantix® II kills and repels mosquitoes MOSQUITOES
K9 Advantix® II kills chewing lice CHEWING LICE
K9 Advantix® II repels biting flies BITING FLIES

Product Label Application & Safety Information
K9 Advantix® II for extra large dog packaging
  • K9 Advantix® II flea and tick treatment for dogs kills through contact, no biting required.
K9 Advantix flea, tick & mosquito protection on lab

Remember, bites are just the beginning.

  • Obviously, bites from fleas, ticks and mosquitoes can be very painful to your dog. Worse, those bites may expose your pet to irritation, itching and even deadly diseases. K9 Advantix® II kills those harmful fleas, ticks and mosquitoes through contact. So they don’t have to bite to die. 

    No wonder veterinarians recommend K9 Advantix® II. So why use anything else?


    Do not use on cats.

K9 Advantix flea, tick & mosquito protection on white dog

Not all flea and tick treatments for dogs work the same way.

  • Chewable flea and tick products may seem more convenient, but what if we told you that chewable products don’t kill fleas and ticks unless they bite your dog? In other words, fleas and ticks have to bite to die. And no chewable flea and tick product doubles as a mosquito repellent for dogs.

    And when it comes to topical mosquito prevention, Frontline® Plus can’t compare to K9 Advantix® II. You won’t find any mention of mosquitoes anywhere on the Frontline® Plus package. Based on label claims, most flea and tick products sold don’t kill mosquitoes.
    And because mosquitoes can transmit deadly diseases to your dog, why not kill them while also killing fleas and ticks?


See how easy it is to provide your dog with
protection against fleas, ticks and
mosquitoes with K9 Advantix® II.

  • Ticks can make your dog sick.


    Learn how K9 Advantix® II kills ticks that can cause disease. 1:45

  • How to apply K9 Advantix® II for dogs


    View step-by-step details in the process. 1:24

K9 Advantix fighting fleas, ticks & mosquitoes on terrier

Comprehensive flea, tick and mosquito protection for your dog.

  • Fleas, ticks and mosquitoes must hate K9 Advantix® II. And why wouldn’t they? K9 Advantix® II is waterproof after 24 hours and kills fleas, ticks and mosquitoes on dogs through contact, so they don’t have to bite your dog to die. 

    When it comes to fleas, ticks and mosquitoes, the bite is just the beginning:

    • Fleas can cause flea allergy dermatitis (FAD), an allergic reaction that can lead to constant scratching, severe itching and hair loss. FAD is one of the most common reasons pet owners take their dogs to the veterinarian. If swallowed, an infected flea can also transmit tapeworms, one of the most common intestinal parasites.
    • Ticks can transmit deadly diseases such as Lyme disease and Rocky Mountain spotted fever.
    • Mosquitoes can transmit deadly diseases, too, including heartworm. Other products may kill fleas and ticks, but that’s just scratching the surface.

    Not sure if or when fleas, ticks and mosquitoes are in your area? Year-round protection is always a wise choice.


K9 Advantix infographic - fleas, ticks & mosquito facts

K9 Advantix fighting fleas, ticks & mosquitoes on black dog

The more you know, the better. For both you and your dog.

  • Learn how fleas, ticks and mosquitoes can have a negative effect on the health of your dog, and much more.

    Can't seem to get rid of those fleas?Learn More >

    Tick disease: It only takes one bite. Learn More >

    Mosquitoes: A little insect that carries big health risks.Learn More >

K9 for Warriors - veteran with dog

We're proud to partner with K9s For Warriors.

  • Post-traumatic stress disorder (PTSD) is a serious issue. An estimated 22 veterans take their own lives every day. That's why K9 Advantix® II has been a longstanding supporter of K9s For Warriors, donating more than $700,000 since 2014.

    This amazing organization pairs specially trained shelter dogs with military veterans suffering from PTSD or traumatic brain injury.

    The program has already helped save hundreds of shelter dogs and veterans. 73% of program graduates report improved health and 92% have reduced or eliminated their dependence on medication.


    Do not use on cats.

1Safeguarding animals from summer heat and pests. World Animal Foundation website. Available at: safeguardinganimalsfromsummerheatandpests.pdf. Accessed 8/22/13.

2Fourie JJ, Stanneck D, Luus HG, et al., (2013). Transmission of Ehrlichia canis by Rhipicephalus sanguineus ticks feeding on dogs and on artificial membranes. Vet Parasitol. 197(3-4):595-603.

3 Accessed 12/16/16.

4 Accessed 12/16/16.

K9 Advantix is a registered trademark of Bayer. Frontline is a registered trademark of Merial.