K9 Advantix II Flea and Tick Control Treatment for Extra Large Dogs, 6 Doses

Maximum-Strength Flea and Tick Control for Your Extra Large Dog

K9 Advantix II Flea and Tick Control Treatment is specially formulated for extra large dogs, delivering six full months of powerful, waterproof protection in a single pack. Designed for the biggest breeds, each monthly dose kills and repels fleas, ticks, mosquitoes, biting flies, and lice on contact — no bite required. Whether your extra large dog is a working breed, a trail companion, or a backyard guardian, K9 Advantix II gives them the heavy-duty protection they deserve.

Broad-Spectrum Defense That Works on Contact

K9 Advantix II doesn't just kill adult fleas — it eliminates fleas at every life stage, including eggs, larvae, and pupae, stopping infestations before they start. It also repels and kills ticks known to transmit Lyme disease, Rocky Mountain spotted fever, and other serious conditions. Fast-acting within 12 hours of application and effective for a full 30 days, each dose is waterproof so your dog stays protected through baths, rain, and outdoor adventures without missing a beat.

Trusted by American Dog Owners, Shipped Fast Across the USA

K9 Advantix II has been a trusted name in flea and tick prevention for dog owners across the United States. Application is quick and straightforward — simply part the fur between your extra large dog's shoulder blades and apply the entire tube directly to the skin once a month. With 6 doses per pack, you're covered for six months of continuous protection. Orders ship fast within the US so your dog's defense starts right away.