K9 Advantix II for Extra Large Dogs is a veterinarian-recommended, topical flea and tick treatment specifically formulated for dogs weighing over 55 lbs. This powerful multi-parasitic repellent and killer offers broad-spectrum protection against fleas, ticks, mosquitoes, biting flies, and lice—without requiring a bite to take action.
Formulated with Imidacloprid, Permethrin, and Pyriproxyfen, K9 Advantix II provides dual-action protection by both repelling and killing pests on contact. This monthly, waterproof application is ideal for dogs living in high-risk outdoor environments, offering consistent protection across varying climates and parasite populations.
This treatment is ideal for extra-large breeds over 55 lbs, including but not limited to:
It’s also perfect for working dogs and outdoor-active breeds exposed to pests in forests, parks, or rural areas.
Important: Do not use on cats—contains Permethrin which is toxic to felines.
Ingredient |
Function |
Imidacloprid (8.8%) |
Kills adult fleas via nervous system disruption |
Permethrin (44.0%) |
Repels and kills ticks, fleas, and mosquitoes |
Pyriproxyfen (0.44%) |
Prevents flea egg and larval development |
These ingredients act synergistically to interrupt the flea lifecycle, repel harmful vectors like mosquitoes, and reduce the risk of vector-borne diseases like Lyme disease and ehrlichiosis.
While generally safe, some dogs may experience:
Discontinue use and consult your vet if adverse reactions persist or worsen.
Always consult your veterinarian for exact dosage instructions depending on your pet's condition.
Dog Weight |
Product |
Frequency |
Over 55 lbs |
K9 Advantix II XL |
Once monthly |
At HardyPaw, we care about your pet and the planet.
Shipping Policy:HardyPaw offer all types of shipping options (Ground, Express, Priority, International) depending on the urgency of the product requirements. To know about our shipping policy in detail, click here.
Refund policy: If you face any issue with our product and want to return it, read our refund policy carefully.
K9 Advantix II is used to kill and repel fleas, ticks, mosquitoes, biting flies, and lice in extra large dogs over 55 lbs, helping prevent infestations and vector-borne diseases.
It begins killing fleas within 12 hours of application and ticks within 48 hours, offering full-spectrum monthly protection.
Yes, the product is waterproof. Wait at least 24 hours after application before bathing or swimming for best results.
No, Permethrin is toxic to cats. Keep treated dogs away from cats for at least 24 hours post-application.
Always consult your vet before combining this treatment with other topical or oral medications.
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