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K9 Advantix II Large Dog is a vet-recommended topical treatment that kills fleas, ticks, mosquitoes, biting flies and lice on dogs weighing 21 to 55 lbs. It starts working within 12 hours and kills adult fleas on contact, so it both clears an existing infestation and prevents a new one. It is a spot-on liquid rather than a collar or pill, which many owners find easier to apply monthly. It suits dogs that spend time outdoors where ticks and mosquitoes are a real risk, and it covers more pests than flea-only topicals.
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Owners generally report that K9 Advantix II clears fleas and ticks quickly and holds up through outdoor activity. Many find the monthly topical easier than pills, though some dislike the residue and smell at the application site.
K9 Advantix II Large Dog is a topical flea, tick and mosquito treatment and preventive for dogs. It protects against fleas, ticks, mosquitoes, biting flies and lice. Each application gives 30 days of treatment and prevention.
The formula kills and repels on contact, so fleas don't have to bite a dog to die. It starts working within 12 hours of application and kills adult fleas on contact to stop existing infestations and prevent new ones. It is effective on both indoor and outdoor dogs.
It is fragrance-free and waterproof after 24 hours. No prescription is needed. This size is for dogs at least 7 weeks old that weigh 21-55 lbs.
