K9 Advantix II Flea & Tick Treatment for Dogs, 4.6 to 11 kg, 2 doses

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About This Item

Details

  • This easy-to-apply topical treatment can be used monthly for year-round protection.
  • Formulated to kill fleas and ticks on contact, K9 Advantix II also kills lice and mosquitoes!
  • Breaks the flea life cycle to help treat and control flea infestations in the home.
  • Safe for dogs and puppies ages eight weeks and older—do not use on cats.
  • This tick, flea, lice and mosquito treatment for dogs can help prevent parasitic concerns such as flea allergy dermatitis, skin infections, Lyme disease and heartworm disease.

Ingredients

Questions & Answers

21 Customer Questions

What are the side effects

Originally posted and answered on chewy.com
Answer by Andrea • Aug 24, 2022
It is recommended to monitor your dog after application. Side effects may include signs of skin irritation such as redness,scratching, or other signs of discomfort. Gastrointestinal signs such as vomiting or diarrhea have also been reported. If these or other side effects (such as lethargy or agitation) occur, consult your veterinarian or call 1-800-422-9874.

How do you apply K9 advantix II on your dog?

Originally posted and answered on chewy.com
Answer by Harley23 • Nov 04, 2021
Make sure u put it somewhere they cant get to and underneath hair. My dogs like to try and run it off after i put it on

My dog likes to move around a lot when I'm trying to apply this onto him. The first few drops I can get onto his skin as directed but the remainder of it gets only on his fur. Will it still work if he doesn't rub it off?

Originally posted and answered on chewy.com
Answer by Harley23 • Nov 04, 2021
Make it fun and reward them for it after. My dogs always try and rub it off after but i put it down on skin under thick hair

If there is ticks already attached and THEN I have applied this topical, do the ticks die or stay alive. Applied 48 hours ago and found a total of four one first 24 hour and then after 48 hours two ticks. Been on pup for a bit they engorged.

Originally posted and answered on chewy.com
Answer by Ebland • May 01, 2021
Detachment of the tick depends on a voluntary movement by the parasite itself. In a dog treated with advantix, the tick dies within 24 hours, which is not enough time for the hypostome to have detached from the dog's skin, and it is therefore possible to find ticks on the dog still fixed in the skin but dead. The tick usually falls off, with expulsion of the hypostome from the skin within the next three days.
Reviews
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4.5
Rated 4.5 out of 5 stars
3505 Ratings
Terms & Conditions

1449 Customer Reviews

Always consult a veterinarian about your pet’s health needs. Customer reviews should not be used as medical advice.

Rated 5 out of 5 stars
By rrrr on Jun 25, 2025

Awesome Customer service

I purchased this product for my dog, however didn’t get to use it as I unexpectedly lost my dog due to kidney disease. The customer service person i spoke with,

I purchased this product for my dog, however didn’t get to use it as I unexpectedly lost my dog due to kidney disease. The customer service person i spoke with, whose name I unfortunately forgot, was so kind and compassionate he not only refunded my money, he went beyond his duty and sent me flowers in one of the most difficult times for a pet parent!! I would deal with this company always!

Rated 5 out of 5 stars
By Shirley on Mar 24, 2025

Fabulous Service

Chewy is my new "go to" for products. They are extremely helpful and delivery time is so fast! I have referred Chewy to friends and family and we are all now hooked

Chewy is my new "go to" for products. They are extremely helpful and delivery time is so fast! I have referred Chewy to friends and family and we are all now hooked on Chewy!

Rated 5 out of 5 stars
By James on Oct 8, 2024

Quick & easy flea & tick meds

It was time to re-order the K9 Advantix II for our 2 dogs. I decided to try out Chewy and I am happy to share that: 1) Chewy carried the K9 Advantix II 2) The price

It was time to re-order the K9 Advantix II for our 2 dogs. I decided to try out Chewy and I am happy to share that: 1) Chewy carried the K9 Advantix II 2) The price compared to my local vet was cheaper (we live in eastern Ontario) 3) The meds arrived at my door in a day (or maybe it was 2 days?) - regardless, the entire process was quick, easy, and we saved a few $$. :-)

Rated 1 out of 5 stars
By DENISE on Jul 18, 2024

Not so good

Didn't work very well on my boy, seem like it was working for a couple days & than the fleas came back with the scratching

Didn't work very well on my boy, seem like it was working for a couple days & than the fleas came back with the scratching

Rated 5 out of 5 stars
By Mick on Jul 29, 2024

Great product

Great product, quick delivery. Great to deal with.

Great product, quick delivery. Great to deal with.

Rated 4 out of 5 stars
By Janet on May 3, 2024

Doggie protection

First time using this means of protection for fleas ticks and mosquito. Reasonably priced

First time using this means of protection for fleas ticks and mosquito. Reasonably priced

Rated 3 out of 5 stars
By Florena on Jan 8, 2026
Originally posted on chewy.com

Does it irritate?

My dog hates it when I apply this. He will leave the room and find something he can roll on to get it off him. The bathroom carpet or the carpet in the basement

My dog hates it when I apply this. He will leave the room and find something he can roll on to get it off him. The bathroom carpet or the carpet in the basement. I wonder does it irritate his skin? Why does he try to get it out of his fur?

Rated 5 out of 5 stars
By Jackie on Jan 11, 2026
Originally posted on chewy.com

Works!

This eliminates fleas and keeps them from returning! My dog is indoors, except for walks and potty breaks. Somehow she still gets fleas. I regularly use these drops,

This eliminates fleas and keeps them from returning! My dog is indoors, except for walks and potty breaks. Somehow she still gets fleas. I regularly use these drops, no more problems! Chewy is always in stock, fast and dependable!

Rated 5 out of 5 stars
By Mae on Dec 31, 2025
Originally posted on chewy.com

Works well!

Our dog knows when we open up the package it’s time for her to get her treatment. She jumps up on the sofa, bends her head down and waits for us to apply her monthly

Our dog knows when we open up the package it’s time for her to get her treatment. She jumps up on the sofa, bends her head down and waits for us to apply her monthly flea and tick preventative to her neck!

Rated 1 out of 5 stars
By Roy on Dec 18, 2025
Originally posted on chewy.com

Chewy fails

Chewy has repeatedly failed in their promises. They tell me as they will you the I am the best part of Chewy. I choose to not do business with a company that does

Chewy has repeatedly failed in their promises. They tell me as they will you the I am the best part of Chewy. I choose to not do business with a company that does not honor their promises. You can be sure they won't post this review.