K9 Advantix for Dogs
The only topical that repels AND kills fleas, ticks, mosquitoes, biting flies, and lice. Before they bite.
Do not use on cats. K9 Advantix contains permethrin, which is toxic to cats. If you have a dog and cat in the same household, keep them separated for 24 hours after application. A cat that grooms a recently treated dog can suffer tremors, seizures, and death.
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Shop CanadaPetCare →What Makes K9 Advantix Different
Most flea and tick products only kill parasites after they bite. K9 Advantix repels them before contact. This matters if you walk your dog in wooded or grassy areas where ticks carry disease. A tick that never attaches cannot transmit Lyme, ehrlichiosis, or anaplasmosis.
The formula combines imidacloprid (kills fleas), permethrin (repels and kills ticks, mosquitoes, flies), and pyriproxyfen (insect growth regulator that stops flea eggs from hatching). The repellent effect starts within minutes of application.
Dosage by Weight
| Dog Weight | Pack Size | Duration |
|---|---|---|
| 4 - 10 lbs | 4 or 6 doses | 4 or 6 months |
| 11 - 20 lbs | 4 or 6 doses | 4 or 6 months |
| 21 - 55 lbs | 4 or 6 doses | 4 or 6 months |
| Over 55 lbs | 4 or 6 doses | 4 or 6 months |
Apply to the skin between the shoulder blades once monthly. Do not bathe for 48 hours after application.
Who Should Use It
K9 Advantix is best for:
- Dogs that hike, camp, or spend time in tick-heavy terrain
- Areas with high mosquito populations (heartworm vectors)
- Owners who want repellent protection, not just kill-on-contact
- Single-pet dog households (or households that can manage cat separation)
Skip it if you have cats that groom your dog or share bedding. The risk is manageable — 24 hours of separation after application — but some owners decide the logistics are not worth it. In that case, Nexgard or Frontline Plus are safer alternatives for mixed-pet homes.
Side Effects
Skin reactions at the application site are the most common complaint: temporary redness, itching, or hair thinning where the liquid was applied. These usually resolve within a few days. A small number of dogs show restlessness or excessive grooming right after application — this is usually a reaction to the sensation of the liquid, not the drug itself.
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