K9 Advantix II

Item #0040155

$29.99 to $69.99

K9 Advantix II

  • K9 Advantix II Image 1
  • K9 Advantix II Image 2
  • K9 Advantix II Image 3
  • K9 Advantix II Image 4
  • K9 Advantix II Image 5
  • K9 Advantix II Image 6
  • K9 Advantix II Image 7
  • K9 Advantix II Image 8
  • K9 Advantix II Image 9
  • K9 Advantix II Image 10
  • K9 Advantix II Image 11
  • K9 Advantix II Image 12
  • K9 Advantix II Image 13
  • K9 Advantix II Image 14
  • K9 Advantix II Image 15
  • K9 Advantix II Image 16
  • Image 0
  • Image 1
  • Image 2
  • Image 3
  • Image 4
  • Image 5
  • Image 6
  • Image 7
  • Image 8
  • Image 9
  • Image 10
  • Image 11
  • Image 12
  • Image 13
  • Image 14
  • Image 15

K9 Advantix II is a once-a-month topical tick, mosquito and flea treatment for dogs and puppies 7 weeks of age or older. Read More

Shipping Restrictions:

This item cannot ship to Canada

(In Stock)
Your Price:


Featured Advice from Our Experts


Canine Wellness Series - Part 3 - Zoonotic Diseases... What can I catch?

At one time or another, most of us have watched our dogs have a bout of the sniffles or diarrhea. Many of us have wondered if we, too, were at risk of getting sick. Diseases that are passed from animals to humans are zoonotic illnesses. The most well known and most feared zoonotic disease is rabies. Read More...


K9 Advantix II

K9 Advantix offers broad spectrum protection that not only kills but repels fleas, ticks, and mosquitoes, this convenient once a once-a-month topical treatment is for dogs and puppies 7 weeks of age or older and weighing 4 lb or more. Containing Imidacloprid and Permethrin plus the insect growth regulator Pyriproxyfen, these ingredients work in unison to repel and kill parasites that can potentially carry diseases.

Features & Benefits of K9 Advantix II:

  • repels and kills ticks, mosquitoes and fleas for up to four weeks
  • repels and kills fleas of all life stages within 12 hours
  • prevents development of fleas for up to four weeks
  • repels biting flies
  • kills chewing lice
  • waterproof
Do not use on cats.

Note: For maximum effectiveness, you should not bathe your pet 48 hours before or after application. The oils of the skin and coat help to distribute the product properly, ensuring that the product will be effective.

View K9 Advantix II manufacturer and label information - Small Dog

View K9 Advantix II manufacturer and label information - Medium Dog

View K9 Advantix II manufacturer and label information - Large Dog

View K9 Advantix II manufacturer and label information - X-Large Dog

If you find a lower price on a product, with an identical brand and model number, Jeffers will match the competitior's price!

Call for details! (800)533-3377


  • Brand: Bayer Animal Health
  • Type: Flea & Tick
  • Form: Spot-On

Reviews (33)

Write A Review

  1. 5.0 out of 5 stars

    "K9 Advantix II"

    Works great for fleas, better than anything else as there is no competition for mosquito repellant, we live in Florida we need more of that, did not kill Lice as it states it does so I had to order more stuff and this is expensive. No vetinarian prescription needed. Great flea control and good mosquito repellant wish there were more for repelling mosquitos especially to prevent Heart worms that part of this is awesom but i dont think the mosquito repellant last longer than 2 weeks. Great at abolishing fleas in every lifecycle. Hreat OTC

  2. 5.0 out of 5 stars

    "Advantix II"


  3. 5.0 out of 5 stars

    "K9 Advantix ll"

    Safe and works great!

  4. 5.0 out of 5 stars

    "best stuff."

    I live in s.w. florida, which is mosquito headquarters, & this stuff really works on ticks, fleas & DREADED MOSQUITOS. effective, yes very. expensive, yes, very, but Jeffers gives the added option of a 2 count when one is on a very tight budget but still wants the best for their babies. YAY Jeffers.

  5. 5.0 out of 5 stars


    Very happy with the K9 Advantix.

  6. 5.0 out of 5 stars

    "Advantix II - I have big dogs"

    i have big rotty's, I have used this advantix II for years, but it no longer works. In 2 to 3 weeks they are scratching again. No swimming pool now , just a large tank they swim almost dailey, before it did not matter , nut now it does not last

  7. 3.0 out of 5 stars

    "Thumbs down"

    Applied this to my dog as directed 10 days ago and she is still miserable. She is not getting any flea relief at all and she is on the low end of this weight category. Granted, we did not have any winter this year and the fleas are bad but she should still get relief with this product. I would rate this a 3 at best.

  8. 5.0 out of 5 stars

    "works great here in the South"

    ...where we have fleas all year round. I have 5 dogs ranging in weight from 4.9 lbs - 135 lbs. Plus various dogs coming in to show. No fleas, no ticks, no coat issues and I just can't have coat problems on a top ranked show dog!!!

  9. 5.0 out of 5 stars

    "It does it all"

    I like having a pest control that does it all. Makes it easier to remember to do their treatments once a month. With the other ones I have to buy another control for heartworm.

  10. 5.0 out of 5 stars

    "k9 advantix II"

    I reviewed it before, and I can say IT REALLY WORKS!! I hope it continues to work well. JE T Jr Laurens, SC..

  11. 5.0 out of 5 stars

    "K9 Advantix II"

    I've used this stuff since I discovered it several years ago. It does the job well, plus it covers one more pest most others don't. Mosquito's. The price might seem high but that more than makes up for the fact I don't have to buy the extra repellent.. I use both the small dog one and the large one, and I've never had a problem with it.

  12. 3.0 out of 5 stars

    "Not all that good"

    Extremely expensive product. One would expect it to work fantastically for what it costs! At $80 I had expected much more! I have five dogs. I will be looking for a better brand which works.

  13. 5.0 out of 5 stars

    "k9 advantix II"

    (I used Frontline for years with great success, however this past year it has not worked..tiny fleas, cat fleas? on my dogs. BUT this K9 ADVANTIX II is working GREAT!! I suppose the fleas have become immune to the Frontline and the others I have tried. Expensive, compared to others BUT WORTH IT!! James PS: How are things "Down Home" have kin-folks down there.

  14. 5.0 out of 5 stars

    "Just once a month"

    All I have to do is remember my Advantix II once a month and it protects my dogs against everything. All the pests including mosquito's. How easy is that???

  15. 5.0 out of 5 stars

    "Best & Safest flea control"

    I've been a Rescue for 40 years. Nothing works better than K9 Advantix (from the original). I won't use anything else!

You May Also Like

Top of Page