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K9 Advantix II Sale Tracker, November 2026

Is K9 Advantix II on sale?

No K9 Advantix II deal is live right now. Deal.ai checks K9 Advantix II prices at every store, and any deal shows here as soon as it starts.

K9 Advantix II is Bayer's topical flea and tick treatment for dogs, known for repelling and killing fleas, ticks, mosquitoes, biting flies and lice. It comes in weight-banded sizes from 4 to over 55 pounds, in 1-, 4- and 6-month packs. Deal.ai checks its price at every store and keeps each product's price history.

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Buying guides that pick K9 Advantix II

  • Buying guide · 6 picksBest flea and tick treatments for dogs under 40 lb

K9 Advantix II prices today, and how low they've been

  • K9 Advantix II
    K9 Advantix II Monthly Flea & Tick Prevention for Large Dogs 21-55 lbs, 2-Monthly Treatment
    K9 Advantix II Monthly Flea & Tick Prevention for Large Dogs 21-55 lbs, 2-Monthly TreatmentPrices and history
  • K9 Advantix II
    K9 Advantix II Monthly Flea & Tick Prevention for Small Dogs 4-10 lbs, 6-Monthly Treatment
    K9 Advantix II Monthly Flea & Tick Prevention for Small Dogs 4-10 lbs, 6-Monthly TreatmentPrices and history
  • K9 Advantix II
    K9 Advantix II Monthly Flea & Tick Prevention for Medium Dogs 11-20 lbs, 2-Monthly Treatments
    K9 Advantix II Monthly Flea & Tick Prevention for Medium Dogs 11-20 lbs, 2-Monthly TreatmentsPrices and history
  • K9 Advantix II
    K9 Advantix II Monthly Flea & Tick Prevention for XL Dogs 55 lbs+, 2-Monthly Treatments
    K9 Advantix II Monthly Flea & Tick Prevention for XL Dogs 55 lbs+, 2-Monthly TreatmentsPrices and history
  • K9 Advantix II
    K9 Advantix Flea, Tick & Mosquito Prevention for Medium Dogs 11-20 lbs., 2-Monthly Treatments
    K9 Advantix Flea, Tick & Mosquito Prevention for Medium Dogs 11-20 lbs., 2-Monthly TreatmentsPrices and history

Questions and answers

When does K9 Advantix II go on sale?
Discounting is heaviest in spring and early summer, when flea and tick season starts, and again around Black Friday. Multi-month packs (4- and 6-count) usually drop more than single doses. Check the price history on this page to see whether the current price is above or below its usual level.
Where is K9 Advantix II cheapest?
Large online pet pharmacies and warehouse clubs typically undercut vet clinics on the 6-month pack, while vet offices bundle it with an exam. Compare the per-dose price across stores here, since pack size changes the math. Watch for expiration dates on deeply discounted stock.
Is K9 Advantix II the same as Advantage II or Advantix?
No. K9 Advantix II is for dogs only and adds tick, mosquito and fly protection plus repellency; Advantage II for dogs treats fleas and lice but not ticks. Never use K9 Advantix II on cats — it is toxic to them.
How often do you apply K9 Advantix II?
Once a month, applied to the skin between the shoulder blades. Wait until the application site is dry before letting the dog swim or be bathed, and don't reapply early. Dogs over 55 pounds use the largest tube.
What is the return policy on K9 Advantix II?
Return rules vary by store; most pet pharmacies accept unopened, unexpired packs within 30 days, and some exclude opened flea products for safety. Confirm the policy at the store you buy from before ordering.
Are there K9 Advantix II discount codes?
Deal.ai doesn't list K9 Advantix II discount codes. It checks what K9 Advantix II products actually cost at every store, so a real markdown shows on this page as a deal as soon as it starts, and each product's page has its price history to tell a sale from its usual price.