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

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In stock
6 treatments
  • 2 treatments
  • 4 treatments
  • 6 treatments
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Description

Help protect your precious pooch from parasitic pests and the potentially harmful diseases they can transmit with K9 Advantix II Flea & Tick Treatment for Large Dogs. This broad-spectrum, veterinarian-recommended treatment is specifically formulated to repel and kill fleas, ticks and mosquitoes on contact with no painful biting required. It further kills all life stages of fleas to prevent re-infestation, and even kills lice while also repelling biting flies. The waterproof formula for puppies and dogs 7 weeks or older and weighing between 21 and 55 pounds continues working for up to four weeks, even after bathing or swimming.

Key Benefits

  • Broad-spectrum, veterinarian-recommended treatment repels and kills fleas, ticks and mosquitoes on dogs 7 weeks or older and weighing 21-55 pounds.
  • Begins working within 12 hours and kills pests on contact with no painful biting required.
  • Kills all life stages of fleas to prevent re-infestation; also kills lice and even repels biting flies.
  • Waterproof formula continues working for up to four weeks, even after bathing or swimming.
  • Convenient, monthly topical application contains imidacloprid, permethrin and pyriproxyfen; available in packs of 2, 4 or 6 treatments.

Additional Details

USE ONLY ON DOGS AND PUPPIES 7 WEEKS OF AGE AND OLDER AND WEIGHING 21 - 55 LBS. DO NOT USE ON CATS. Do not get this product in dog's eyes or mouth. As with any product, consult your veterinarian before using this product on debilitated, aged, pregnant or nursing animals. Individual sensitivities, while rate, may occur after using ANY pesticide product on dogs. If signs persist, or become severe, consult a veterinarian immediately. If your animal is on medication, consult your veterinarian before using this or any other product. Keep out of reach of children.

Active Ingredients

  • Imidacloprid 8.80%
  • Permethrin 44.00%
  • Pyriproxyfen 0.44%

See all items by K9 Advantix II

  • Item Number
    74405
  • Brand
    Bayer
  • Breed Size
    Small Breeds, Medium Breeds
  • Lifestage
    Adult, All Stages

Instructions

How to open:

  • Be sure tube is at bottom of pouch.
  • Using scissors, cut the pouch across the top and remove tube.

How to apply:

  • Use only on dogs.
  • Remove applicator tube from the package. Use scissors and peel down foil.
  • Hold applicator tube in an upright position. Pull cap off tube.
  • Turn the cap around and place other end of cap back on tube.
  • Twist cap to break seal, then remove cap from tube.
  • The dog should be standing for easy application. The entire contents of the K9 Advantix II tube should be applied evenly on the top of the back from the shoulder to the base of the tail. At each spot, part the hair until the skin is visible. Place the tip of the tube on the skin and gently squeeze to expel a portion of the solution on the skin. Do not apply an excessive amount of solution at any one spot that could cause some of the solution to run off the side of the dog.
  • Discard empty tube.
  • In cases of severe pest infestations, retreatment is allowable earlier than 4 weeks. Do not retreat more often than once every 7 days. After pest control is attained, return to a monthly retreatment schedule.
  1. K9 Advantix II Use & Care Instructions

Size

Dog Weight K9 Advantix II Volume
Under 10 lbs Small Dog 0.4 mL tube
11 - 20 lbs Medium Dog 1.0 mL tube
21 - 55 lbs Large Dog 2.5 mL tube
Over 55 lbs Extra Large Dog 4.0 mL tube

FAQ

Frequently Asked Questions

How is K9 Advantix II different from K9 Advantix?

With the addition of an insect growth regulator (IGR), K9 Advantix II kills all life stages of fleas. K9 Advantix II also prevents development of fleas, flea eggs, larvae (maggots), and pupae (cocoons), and prevents fleas on a treated dog from infesting your home.

What is the benefit of repellency?

Repellency helps prevent ticks, fleas, and mosquitoes from attaching, biting or feeding. A repelled parasite doesn’t bite or attach. If it doesn’t bite or attach, it can’t transmit the organisms that may cause disease.

What is the difference between K9 Advantix II and other tick and flea products?

K9 Advantix II repels and kills ticks, fleas, and mosquitoes. It repels biting flies and kills lice, too. Its repellency activity and broad spectrum make K9 Advantix II different from other tick and flea products.

Is K9 Advantix II waterproof?

Yes. There is no need to reapply the product after weekly swimming or a bath. For best results, use a non-detergent shampoo.

Can I use K9 Advantix II on my cat?

No. K9 Advantix II must not be used on cats because of a cat’s unique physiology and inability to metabolize certain compounds.

Customer Reviews

629 reviews 629 Reviews 4.6 out of 5 Stars

95% Recommend

95% of reviewersrecommend this product

4.6 / 5

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  • GREAT PRODUCT

    By on

    My favorite out of "several other brands"...I've tested !! Proud ShihTzu Mommy(10+yrs). The price is about average as with other stores. Reading some of the 'reviews from all Brands on Flea/Tick Stories..and "not doing it's Job !!". These products DO TAKE 1-2 DAYS...but Pet Owners need to Do Their Job as Well. I recommend (1) bathe ur pet well+rinse well, towel dry well & keep him/her secured from rolling around anywhere & getting the fur covered w/grass-dirt-until you 'First get the Flea/tick treatment ON...I also recommend washing your pets bedding every week w/your laundry soap...and put Vinegar in the Rinse tray..not softener.!! Keep the ears clean as well...mites love warmth !! Soapy My favorite out of "several other brands"...I've tested !! Proud ShihTzu Mommy(10+yrs). The price is about average as with other stores. Reading some of the 'reviews from all Brands on Flea/Tick Stories..and "not doing it's Job !!". These products DO TAKE 1-2 DAYS...but Pet Owners need to Do Their Job as Well. I recommend (1) bathe ur pet well+rinse well, towel dry well & keep him/her secured from rolling around anywhere & getting the fur covered w/grass-dirt-until you 'First get the Flea/tick treatment ON...I also recommend washing your pets bedding every week w/your laundry soap...and put Vinegar in the Rinse tray..not softener.!! Keep the ears clean as well...mites love warmth !! Soapy warm cloth or cotton balls will do(Dawn Dish soap works great) to get that stinky-yucky wax film out...Ur Babies will Lick Ur Face 4-It !!! … more

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  • We now have an infestation

    By on Top 250 Contributor

    We've ordered a couple boxes of this brand since October hoping to give it more of a chance to work. Since bringing home our rescue with fleas we've been struggling and this brand hasn't helped. It probably killed some fleas but not enough to notice as we now have a full on infestation (and we have 3 dogs and 2 cats in the house). We'll be trying another brand this month along with a spray for within our home and one for the yard. These Louisiana fleas are awful..

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  • top notch protection

    By on

    Been using K9 Advantix for years. This product has never failed me. Keeps me from having to flea treat my indoor only cats because I can be confident nothing is coming in the house on my dogs. I am a loyal user. And Chewy has the best price I've seen.

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  • Seemed to work..

    By on

    I adopted 2 dogs, a 6 month old samoyed puppy, and just recently a husky. I also have a older dog 14.The deer ticks here in South western Pennsylvania are bad. Everytime they went out, I found them on my dogs, I could see them clearly on my samoyed, but the other 2 are dark colored. I got them off asap, but some I missed. And fleas too. So I ordered the advantix to try to tackle the problem. They still were scratching, and I still found ticks, but they died soon as they started sucking, and the fleas, they were gone. So it did it's job. I didn't see them all over them when they came in. So it works....

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  • K9 Advantix 2

    By on

    I have used this product (including the earlier version, K9 Advantix) on my dog(s) for years. Pros: 1) highly effective; 2) costs about half as much as newer oral product Nexgard. Cons (minor): 1) makes the dog's back itchy for a day or two; 2) while application takes only a minute, it is a 2-person job, with one person holding the dog still and properly positioned while the other applies the product. I will be switching to an oral product (Nexgard) that is now available at my vet's recommendation. While Advantix II is not hard to use, the monthly oral product will be even easier to administer. Also, my new dog has a very long lean torso and is very flexible, so unlike most dogs, he I have used this product (including the earlier version, K9 Advantix) on my dog(s) for years. Pros: 1) highly effective; 2) costs about half as much as newer oral product Nexgard. Cons (minor): 1) makes the dog's back itchy for a day or two; 2) while application takes only a minute, it is a 2-person job, with one person holding the dog still and properly positioned while the other applies the product. I will be switching to an oral product (Nexgard) that is now available at my vet's recommendation. While Advantix II is not hard to use, the monthly oral product will be even easier to administer. Also, my new dog has a very long lean torso and is very flexible, so unlike most dogs, he is actually able to lick the last few inches of the top of his back, making application to that important area problematic. However for the typical dog who is not SUPER flexible, and to lessen expenses, Advantix II is fine. … more

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  • Very good protection

    By on

    My three dogs are pest free due to advantixII, and Chewy.com has certainly helped the cost to lower. Thanks, Chewy.com from Tobi, Snow and Zeus

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  • Great Product

    By on

    I have used this product with my Snickers for 4-5 years. I have seen no evidence of ticks, fleas or mosquitoes. Simple to use (follow the directions). My dog has had no adverse reactions.

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  • Great Value

    By on

    So glad Chewy carries the flea meds I need for my fur baby. The vet's office costs so much more. Thanks Chewy for this great value price!!

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  • Wonderful!

    By on

    We have been battling fleas in our yard and on our pup for months. We have tried treating the yard, bathing her consistently, and other topical flea treatments. Within one day of applying this treatment, the fleas were completely gone. We applied it a couple weeks ago and have checked every day, and have yet to see a single flea! I know others mentioned that this irritated their dogs skin, but we didn't notice any significant irritation...maybe some redness the first day.

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  • Eh not the best

    By on

    Took 3 doses to get the fleas under control. Expected a lot more from this product. Will try frontline or another brand next time.

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