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K9 Advantix II Flea & Tick Treatment for Dogs 21-55 lbs

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    $62.98 FREE 1-2 Day Shipping

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In stock
  • 2 treatments
  • 4 treatments
  • 6 treatments


  • Item Number
  • Breed Size
    Small, Medium
  • Lifestage
    Adult, Puppy
  • Brand

K9 Advantix II Flea Treatment for Dogs 21-55 lbs offers broad spectrum flea control and protection against ticks and mosquitoes, too. It is specifically formulated for dogs and comes in a convenient, monthly topical application that not only kills but also repels fleas, ticks and mosquitoes. K9 Advantix II also kills all life stages of fleas, repels biting flies and kills lice. It contains imidacloprid, permethrin and pyriproxyfen that work in concert to repel and kill parasites that can potentially transmit disease-causing organisms. K9 Advantix II is a flea treatment for use on dogs 7 weeks and older.

Key Benefits

  • Flea treatment for dogs between 21 and 55 pounds
  • Repels and kills ticks, fleas and mosquitoes
  • Repels biting flies and kills lice
  • Kills all life stages of fleas and prevents development of fleas, flea eggs, larvae and pupae
  • Prevents fleas on a treated dog from reinfesting the home
  • Kills fleas within 12 hours and kills reinfesting fleas within 2 hours
  • Provides waterproof protection

See all items by K9 Advantix II

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Customer Reviews

Rated 4.7 out of 5 by 260 reviewers.
Rated 2 out of 5 by Skin irritant for sensitive skin dog I purchased this product in hopes that it would lessen the mosquito bites on my terrier/Korean jindo mix. He was on Frontline Plus before which did not bother his skin when applied; however, it did nothing for mosquito bites. This product left very dark red spots at the sites of application about 24 hours after applying. I washed off the residue and am waiting to see if that helped at all. I gave it 2 stars because we haven't used it long enough to determine its effectiveness, but the applicator itself was worth 2 stars as it is much easier and compact than Frontline. Unfortunately, we will have to switch to a collar or back to Frontline. I really wanted this to work! July 9, 2016
Rated 5 out of 5 by Good price, fast free delivery Chewy gets A+ for good price and very fast and free delivery. I will rely on the science as far as the product is concerned. Like any preventative, pre-emptive product, you go on faith. I chose K9 Advantix II because it stops flea, tick, and mosquitoes. Also, it doesn't contain the harmful chemical TCVP. I prefer this topical application over the ingested form because I worry about their digestive system. July 18, 2016
Rated 5 out of 5 by Great service! We have used K9 Advantix for years with excellent results. I am glad we discovered Chewy! Delivery was quick & the price was great! July 11, 2016
Rated 5 out of 5 by this product works well would recommend again I would definitely tell others to use and purchase online from chewy.com July 18, 2016
Rated 5 out of 5 by This product has great features. It help out my dog alot. No more fleas, ticks, and etc. July 18, 2016
Rated 5 out of 5 by This product does indeed do what it says I have found ticks on my baby, (dog) but they were dead. I just don't care for the liquid as she sleeps in our bed, and it kinda gets onaked the bedding. I have had great luck with the pills though, and I haven't found even a dead one on her. Just sayin July 7, 2016
Rated 5 out of 5 by K9 Advantix is amazing We have a palmerainian and his hair is very thick like a sheep and I tell everyone I see to get advantix its amazing!! Even better on chewy.com July 12, 2016
Rated 5 out of 5 by Always effective I have used this product many times. Completely effective in protecting my dogs from fleas, ticks and mosquitoes. Highly recommend July 12, 2016
  • 2016-07-23 T10:58:44.845-05:00
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