K9 Advantix II Dogs Over 55 lbs Flea & Tick Treatment – 6 Month Supply

K9 Advantix II Dogs Over 55 lbs Flea & Tick Treatment – 6 Month Supply

$71.17
$71.17 $79.97
SAVE 11% Sold out

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K9 Advantix II Dogs Over 55 lbs Flea & Tick Treatment – 6 Month Supply

K9 Advantix II Dogs Over 55 lbs Flea & Tick Treatment – 6 Month Supply

$71.17
$71.17 $79.97
SAVE 11% Sold out

Protect your big dog from fleas, ticks, and mosquitoes with K9 Advantix II for Extra-Large Dogs, the vet-recommended, triple-action solution trusted by pet owners worldwide. Designed for dogs over 55 lbs, this easy-to-apply topical treatment provides powerful 6-month protection against pests that can harm your dog’s health and comfort.

Unlike oral medications that require a bite to work, K9 Advantix II kills and repels pests on contact—stopping fleas, ticks, and mosquitoes before they can bite or transmit diseases. It starts working within 12 hours, killing fleas at all life stages—eggs, larvae, and adults—and preventing reinfestation for ongoing relief.

Perfect for active and outdoor dogs, this waterproof formula stays effective after bathing, swimming, or rain, giving your furry friend complete protection no matter the adventure.

With once-a-month application, you can enjoy peace of mind knowing your XL dog is guarded by one of the most trusted names in pet protection.

🌟 Key Benefits

✅ Triple Defense Protection – Kills and repels fleas, ticks, and mosquitoes.

✅ Fast-Acting Formula – Starts killing fleas within 12 hours of application.

✅ Vet-Recommended & Proven Effective – Trusted by professionals worldwide.

✅ Breaks the Flea Life Cycle – Eliminates eggs, larvae, and adults to stop infestations.

✅ 6-Month Supply – Long-lasting, easy monthly doses.

✅ Waterproof Protection – Continues working after baths or rain exposure.

✅ For Dogs Over 55 lbs – Specially formulated for extra-large breeds.

🧬 How It Works

K9 Advantix II uses a triple-action formula with Imidacloprid, Permethrin, and Pyriproxyfen to kill fleas, ticks, mosquitoes, biting flies, and lice on contact. The ingredients spread through your dog’s natural skin oils, creating a protective barrier that provides full-body coverage without requiring pests to bite first.

📦 What’s Included

6 × Pre-measured monthly doses (6-month supply)

Easy-to-follow application instructions

💡 Why Pet Owners Love It

No pills. No collars. No stress. Just one monthly topical treatment that gives your dog fast relief and long-lasting protection. Trusted by veterinarians and loved by dog parents, K9 Advantix II keeps your large dog happy, healthy, and itch-free all year long.

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Advanced Flea, Tick & Lice Protection You Can Trust

Keep your cats and dogs protected with a proven formula designed to eliminate fleas, ticks, flea eggs, flea larvae, and chewing lice. Trusted by pet owners for fast-acting, reliable monthly protection.

Trusted Protection. Everyday Comfort.

Keep your pets protected from fleas and ticks with a long-lasting solution that's simple to use, veterinarian recommended, and designed for everyday comfort.

Month-Long Protection in Just One Application

Keep your dog protected from fleas, ticks, mosquitoes, and biting flies with a fast-acting formula that delivers reliable protection for up to 30 days.

Compare Our Trusted Flea & Tick Protection Brands

Find the right flea and tick protection by comparing the key benefits of our most trusted pet care brands.

Features Frontline Plus Advantage II K9 Advantix II Seresto
Kills adult fleas
Kills flea eggs
Kills flea larvae
Protects against ticks
Repels mosquitoes
Repels biting flies
Kills chewing lice
Waterproof protection
Monthly topical treatment
Up to 8 months protection
Easy to apply
Suitable for cats
Suitable for dogs

    Frontline Plus

    Frontline Plus helps protect cats from fleas, flea eggs, flea larvae, chewing lice, and ticks. It also helps break the flea life cycle by preventing future infestations.
    Apply one dose every 30 days for continuous flea and tick protection. Regular monthly treatment provides the best results.
    Yes. Frontline Plus for Cats is suitable for kittens 8 weeks of age and older that meet the minimum weight requirements listed on the package.

    Seresto

    Seresto provides continuous flea and tick protection for up to 8 months without the need for monthly applications.
    Yes. Seresto remains effective after occasional exposure to water, including rain and bathing, although excessive water exposure may shorten its effectiveness.
    Yes. The collar is designed for continuous wear and should remain on your pet to maintain uninterrupted protection.

    Advantage II

    Advantage II kills adult fleas, flea larvae, and flea eggs to help stop flea infestations quickly and effectively.
    Advantage II begins killing fleas within hours after application and continues protecting your cat for up to one month.
    Yes. Indoor cats can also be exposed to fleas, making monthly flea prevention an important part of their health care.

    K9 Advantix II

    K9 Advantix II helps protect dogs against fleas, ticks, mosquitoes, biting flies, and lice.
    No. K9 Advantix II is formulated only for dogs and should never be used on cats.
    Apply one treatment every month to maintain continuous protection against fleas, ticks, mosquitoes, and other listed pests.