K9 Advantix Flea, Tick & Mosquito Prevention for Extra Large Dogs Over 55 lbs., 2-Monthly Treatments
K9 Advantix Flea, Tick & Mosquito Prevention for Extra Large Dogs Over 55 lbs., 2-Monthly Treatments
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K9 Advantix Flea, Tick & Mosquito Prevention for Extra Large Dogs Over 55 lbs., 2-Monthly Treatments

4.3 stars out of 5675 reviews
(4.3)|
5,675 ratings

Key item features

  • An excellent value from the K9 Advantix brand
  • K9 Advantix Extra Large Dog 30-day treatment & prevention protects dogs over 55 lbs. from fleas, ticks, mosquitoes, biting flies, and lice
  • Affordable formula works on contact to kill and repel fleas on dogs within 12 hours of application even without a bite
  • Easy-to-apply topical treatment is fragrance-free and waterproof after 24 hours
  • No prescription needed
Current price is $14.98$7.49/count
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Customer ratings & reviews

4.3 out of 5 stars
stars5,675 ratings1,817 reviews
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Reviews summary

Pros
  • : Application process is simple and fast.
  • : Provides long-lasting defense against multiple insects.
  • : Offers good value at this price point.
  • : Effective for dogs 7+ weeks old and over 55 pounds.
  • : Reduces scratching in dogs after application.
  • : Has little to no noticeable odor.
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Showing 1-3 of 1,817 reviews

May 19, 2025
anonymous
Top Reviewer
Item details
Multipack quantity: 1
Pet size: Large
5 out of 5 stars review

Verified Purchase

Tried %26 True

I prefer an oral flea treatment as I don't want pesticide in my own bloodstream from the topical getting on everything the dog lays on (%26 then I touch). But I have 1 dog that can't take oral treatment. So I've used Advantix for 12yrs. I do bathe him exactly 24hrs after application to avoid it transferring around my home.

Helpful?2AOU0QP68G3R2340108313
Jul 14, 2025
WalmartCustomer
Item details
Multipack quantity: 1
Pet size: Extra Large
5 out of 5 stars review

Verified Purchase

I have used this product for a couple years now. It has always been effective at preventing and treating fleas and ticks. I'm not *********% sure about the biting flies, but my three year old Catahoula bulldog is an indoor dog and only goes outside to go potty or about three times a week to socialize with other dogs at a leashless dog park nearby. I haven't noticed any biting flies swarming him at least. I have used other flea/tick treatment, that one from Walmart as well, costing $5-$6 for a three month supply, and discovered that brand wasn't as effective after seeing a tick on my dog and increased scratching four days after applying that flea/tick treatment/prevention. I was wanting to test it's efficacy based on the very cheap price and won't use it again. Lesson learned. The price of this flea and tick treatment is very affordable, and it truly works. I have used it long enough to know it works. If anything, give it a try and see for yourself.

Incentivized Review
Helpful?2AOU0QP68G3R2340108313
Jul 25, 2025
WalmartCustomer
Item details
Multipack quantity: 1
Pet size: Small
5 out of 5 stars review

Verified Purchase

I've used this brand before with another dog, so I know it works well. It is easy to apply and you only need to use it once a month. At the time that I purchased it, it was around $15 for two applications, with it only needing to be applied once a month. As such, it will hopefully get me through flea and tick season without needing to buy more. And even if I do need to buy more, it won't cost much and won't take long to receive it, so it makes it easy.

Incentivized Review
Helpful?2AOU0QP68G3R2340108313