K9 Advantix II – Vet-Recommended Flea & Tick Protection for Dogs
K9 Advantix II provides monthly flea and tick treatment and prevention trusted by veterinarians across Canada. Available in tailored doses for medium, large and extra-large dogs, this topical solution helps protect dogs from fleas, ticks and mosquitoes. Easy-to-apply, effective and designed for year-round use on dogs only.
One application per month helps break the flea life cycle and provides ongoing defence against ticks throughout the seasons.
Weight-Specific Dosing
Clearly labelled options for medium (4.6–11 kg), large (11–25 kg) and extra-large (over 25 kg) dogs ensure proper dosing.
Multi-Pest Defence
Targets fleas, ticks and mosquitoes, offering broad external parasite protection in a single monthly treatment.
Vet-Recommended Formula
Widely recommended by Canadian veterinarians for reliable, convenient flea and tick control in dogs of various sizes.
Easy Topical Application
Simple spot-on treatment that is applied to the skin and does not require oral medication or complex routines.
Flexible Pack Sizes
Available in 2-dose, 4-dose and 6-dose packs so owners can choose short-term or longer supply according to need.
K9 Advantix II Bestsellers
Advantix II Flea and Tick Treatment for Extra Large Dogs Weighing Over 25 kg (Over 55 lbs.)-6 doses
This 6-dose pack of Advantix II is formulated for extra-large dogs over 25 kg (over 55 lbs.). Provides monthly flea, tick and mosquito protection for a full half-year supply. Vet-recommended topical treatment designed for year-round use on dogs only. Easy application and reliable coverage make it a practical choice for larger breeds and active outdoor dogs.
Advantix II - Flea/Tick Prevention - Vet Recommended - Large Dog - 6-Pk | Vet-recommended monthly year-round flea and tick treatment and prevention for dogs only
Advantix II 6-Pack for Large Dogs delivers six months of vet-recommended flea and tick prevention. Suitable for dogs in the large weight range, this monthly topical treatment helps protect against fleas, ticks and mosquitoes. Designed exclusively for dogs and ideal for owners who prefer a longer supply without frequent reordering.
Advantix II Flea and Tick Treatment for Extra Large Dogs Weighing Over 25 kg (Over 55 lbs.)-2 doses
This 2-dose pack is perfect for extra-large dogs over 25 kg who need short-term or trial flea and tick protection. Same trusted Advantix II formula in a smaller quantity for convenience or seasonal use. Easy spot-on application provides monthly defence against common external parasites. Suitable for dogs only.
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Protection: Flea & tick
Accuracy: Weight-based doses
Convenience: Monthly application
Trust: Vet recommended
Coverage: Multi-pest
Choice: Flexible packs
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K9 Advantix II Reviews
Our satisfied customers have found K9 Advantix II solutions to be remarkably effective and user-friendly, as evidenced by the following reviews
We’ve used Advantix II on our large dog for two seasons now. Application is quick, and we haven’t seen fleas or ticks even after hikes. The 6-pack is convenient and the sizing chart made choosing the right dose easy.
Sarah Patel
Our medium-sized dog is on the 4-dose pack. No greasy residue issues and it seems to keep the pests away effectively. Vet recommended it and we’re happy with the results so far through spring and summer.
Michelle Tremblay
Switched to the extra-large 6-dose after our previous product stopped working as well. Noticeable difference in tick prevention during cottage season. Easy to apply and the pack lasts half the year, which is practical.
Emily Clarke
Do you need a K9 Advantix II
Contact our knowledgeable team at for a consultation, where we’will provide customized guidance and recommendations tailored to your needs.