• 6 MONTH K9 Advantix II TEAL for Medium Dogs (11-20 lbs)

6 MONTH K9 Advantix II TEAL for Medium Dogs (11-20 lbs)

SKU: 5461618
Regular Price: $100.99Sale Price: $74.95
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K9 Advantix II TEAL for Medium Dogs 11-20 lbs

Keep your dog safe from irritating and dangerous pests with k9 Advantix for dogs 11-20 Lbs. Formulated for dogs seven weeks of age and older and weighing 11-20 pounds and under, K9 Advantix II outperforms its competitors not only by killing more varieties of pests, but also by repelling them to prevent future attacks.

Repels and Kills Ticks, Fleas, and Mosquitos

The active ingredients in K9 Advantix II help keep your dog safe from ticks, fleas, and mosquitoes. These effective compounds attack the pests' nerve cells, paralyzing and effectively killing them, as well as repelling them from future attacks. Most ticks are repelled and killed before they can attach, which may reduce the risk of transmitting disease-causing organisms to your pet. K9 Advantix II effectively kills and repels Deer ticks, American dog ticks, Brown dog ticks, and Lone Star ticks.

K9 Advantix II for Medium Dogs up to 11-20 lbs
  • Kills and repels ticks, fleas, and mosquitoes
  • Repels biting flies and kills lice
  • Waterproof formula won't wash off from swimming or bathing
  • Includes six convenient one-month doses
  • Easy to apply
  • For dogs seven weeks of age and older and weighing 11-20 pounds and under
  • Per Dose: $10.83
Dog flea life cycle
K9 Advantix II and Frontline Plus Comparison Chart
Fights Against Fleas at All Stages of Development

K9 Advantix II protects your pet against fleas at all stages of the parasite's development. K9 Advantix II breaks the flea life cycle by killing the living fleas on your dog before they can lay eggs. It also prevents the development of existing flea eggs, larvae, and pupae, helping to prevent future infestations.

K9 Advantix II also kills reinfesting fleas (newly hatched fleas jumping back on your dog) within two hours, and it prevents fleas on a treated dog from infesting your home.

Effective Against Biting Flies and Lice

In addition to complete tick, flea, and mosquito protection, K9 Advantix II also repels painful biting flies from feeding on your dog, and it effectively kills up to 100 percent of lice within one week of treatment.

Waterproof Formula

K9 Advantix II is waterproof, so there's no need to reapply after your dog has a bath or goes for a swim. Studies show that dogs are still protected against parasites after exposure to water, though for best results, dogs treated with K9 Advantix II should be bathed with a non-detergent shampoo.

Package Contents

Box includes six 1.0-milliliter tubes of K9 Advantix II for Medium Dogs 11-20 pounds.

Flea Cycle

Usage Info

How to Apply

Applying K9 Advantix II to your pet is a fast and easy process. First, remove the K9 Advantix II applicator tube from its packaging and use scissors to peel down the foil. Next, hold the applicator tube in an upright position and pull the cap off the tube. Use the upturned cap to break the protective seal, and you're ready for application.

For easiest application, your dog should be standing upright. Evenly apply the entire contents of the K9 Advantix II tube to two or three spots from the back of the shoulder to the base of the tail. Part the hair at each spot until the skin is visible, then place the tip of the tube on the skin and gently squeeze out a portion of the solution. Be careful not to apply an excessive amount of the solution in any one spot, otherwise some of the solution might run off the side of your dog. Dispose of the container and do not reuse or refill. Do not empty unused product in any indoor or outdoor drain.

For optimal control and prevention of parasites, use K9 Advantix II every month. K9 Advantix II is available in four- and six-month supplies. Do not use K9 Advantix II on cats or any animals other than dogs.

Application Instructions

Evenly apply the entire contents of the tube to four to six spots on the top of the back--from the shoulder to the base of the tail. Apply monthly.

Length of Effectiveness

Under normal conditions, the product is effective for one month. However, in cases of severe flea infestation, retreatment may be necessary earlier than four weeks. Do not retreat more often than once every seven days. After flea control is attained, return to a monthly retreatment schedule.

Hazards to Humans

Causes eye irritation. Harmful if swallowed. Do not get in eyes or on clothing. Avoid contact with skin. Wash hands thoroughly with soap and warm water after handling.

Hazards to Domestic Animals

*For external use on dogs only.
*Do NOT use on animals other than dogs.
*Do NOT use on puppies under seven weeks of age.

Do not get this product on dog's eyes or mouth. Consult your veterinarian before using this product on debilitated, aged, pregnant, or nursing animals. Individual sensitivities, while rare, may occur after using any pesticide product for pets. If signs persist, or become more severe, consult a veterinarian immediately. If your animal is on medication, consult your veterinarian before using this product.

Do Not Use on Cats

Due to their unique physiology and inability to metabolize certain compounds, cats must not use this product. If applied to a cat, or ingested by a cat that actively grooms a recently treated dog, this product may have serious harmful effects. If this occurs, contact your veterinarian immediately.

Environmental Hazards

This product is extremely toxic to fish. Do not add directly to water. Do not contaminate water when disposing of product or package.

First Aid

Have the product container or label with you when calling a poison control center or doctor, or when going for treatment.

If in eyes: Hold eye open and rinse slowly and gently with water for 15 to 20 minutes. Remove contact lenses, if present, after the first 5 minutes, then continue rinsing eye. Call a poison control center or doctor for treatment advice.

If swallowed: Call poison control center or doctor immediately for treatment advice. Have person sip a class of water if able to swallow. Do not induce vomiting unless told to do so by the poison control center or doctor. Do not give anything by mouth to an unconscious person.

If on skin or clothing: Take off contaminated clothing. Rinse skin immediately with plenty of water for 15 to 20 minutes. Call a poison control center or doctor for treatment advice.

To physician: Treat patient symptomatically.

Keep out of reach of children.



How long does K9 Advantix last?

A single application of K9 Advantix keeps working for one month.

How often should I use K9 Advantix?

Experts recommend monthly application to keep your dog protected year-round.

My dog is strictly indoors. Should I still use K9 Advantix?

Yes, ticks and fleas can be brought into the home by people or other pets--without owners even realizing it. Immature flea stages remain dormant until conditions are appropriate for development. This is why it is also important to protect indoor pets.

Can I bathe my dog during the month after application?

Yes, you can give your dog a bath. A non-detergent shampoo is recommended for best results.

How young can the dog be for application?

K9 Advantix is gentle enough for puppies as young as seven weeks.




Imidacloprid is an ectoparasiticide, an antiparasitic agent that targets parasites living primarily on the surface of a host. Chemically classified as a chloronicotinyl nitroguanidine, imidacloprid inhibits neurotransmitter transmission in insects, resulting in paralysis and death.


Imidacloprid exhibits both adulticide and larvicidal flea efficacy; it not only kills adult fleas and larvae on your pet, but it also kills larval stages in your pet's immediate surroundings.

Main Purpose

To kill fleas at all stages of their life cycles and stop them from being able to move or feed.


Permethrin is the additional ingredient in Advantix. It belongs to the Type I class of pyrethroid acaricides and insecticides, and it also acts as a repellent. Pyrethroids affect muscle and nerve cells' sodium ion channels by increasing their mean open time, which leads to hyperexcitability and death of the parasite.


Thanks to its repelling activity, permethrin reduces parasite bites and thus the risk of diseases and stress for your dog.

Main Purpose

To repel ticks, sand flies, and mosquitoes; to kill ticks and fleas.

Two Proven Ingredients with Enhanced Activity

Imidacloprid and permethrin work together to overwhelm the nervous system of the parasite, providing neurotoxic activity beyond that of each compound alone. This leads to more profound and quicker insect paralysis and death.

Specifically, imidacloprid increases the efficacy of permethrin by activating insect nerve cells and increasing the frequency of neurotransmissions. As a result, more sodium channels are opened and the pyrethroid can interact much better with its target site.


Pyriproxyfen is a pyridine-based pesticide. A juvenile hormone analog, it interferes with the hormone signaling of growing insects, so that insects in immature stages are unable to mature. Additionally, a female insect that touches the toxin will produce eggs that will not hatch.


Pyriproxyfen provides an added layer of protection for pets and their surroundings. It interrupts the flea life cycle at multiple stages, halting the growth and development of insect eggs and larvae and preventing reinfestation.

Main Purpose

To prevent flea eggs from hatching and larvae from growing.

Active Ingredients % by Weight
Imidacloprid 8.80%
Permethrin* 44.00%
Pyriproxyfen 0.44%
Other Ingredients 46.76%
Total 100%
*cis/trans ratio: max 55% () csi and min 45% () trans
Net Contents

Six tubes, each 0.034 fluid ounces (1.0 milliliters)

12 MONTH K9 Advantix II GREEN for Small Dogs (upto 10 lbs)12 Mo K9 Advantix II (up to 10lb)Reg price: $198.99
Sale price: $148.95
4 MONTH K9 Advantix II TEAL for Medium Dogs (11-20 lbs)4 Mo K9 Advantix II (11-20 lbs)Reg price: $70.99
Sale price: $49.95
12 MONTH K9 Advantix II TEAL for Medium Dogs (11-20 lbs)12 Mo K9 Advantix II (11-20lb)Reg price: $196.99
Sale price: $148.95
4 MONTH K9 Advantix II RED for Large Dogs (21-55 lbs)4 Mo K9 Advantix II (21-55 lbs)Reg price: $71.99
Sale price: $49.95
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Customer Reviews

DISCLAIMER: The results described on the testimonials on this site, are the individual experiences and personal opinions of those who have purchased and used the products. These testimonials are not intended to make any claims that the products can be used to diagnose, treat, mitigate, cure or prevent any disease or medical condition.
Click here to see all reviews
Atlanta Mom Dissapointed by Carol from Marietta, GA05/20/2014

I have two shih tzus with short hair because I keep them trimmed so I can see the ticks. I do not have them bathed a week before or a week after I apply it. This does not stop the ticks at all. Every day I pull 2-3 engorged ticks off of them. Frontline does not work and neither does this. I don't know what to try next. They only go outside maybe 4 times a day for 5 min.

by from 01/15/2013

and is also, I believe, registered as a mosquito repellant. Where, I live, in NW VT, these are the primary insectival parasites. This past summer was -- I was told by others -- a terrible years for deer ticks in my area. But I found only one .... on myself, not my dog.

is by a from greatI


Pet Order by Ronnie from Michigan07/01/2012

Pet order arrive really fast. The price on the K9 advantix II was great. Will definitely order fromEntirely Pets again.

never had a problem since I started using it. by rick03/13/2013

Works great for me and my dogs. seems cheaper here that elsewere.

Best Flea protection by SuzinMcQ from Chesterfield, Virginia03/26/2013

I have always used K9 ADVANTIX II on my dogs.

K9 advantix by 4zgirl from Richmond, VA02/01/2012

Covers it all esp. For my little one whos into everything in the back yard and for my lab who's always in the creek! Couldn't trust any other brands to prevent fleas tickd and Mosquitos

Well worth the money by kabm06/13/2012

I have been using K9 Advantix for my dog for years and have never had a problem with fleas or ticks.

The right product at a way better price by kellyjenne from Nova Scotia05/28/2012

I received the same medication for my pets that I receive from my vet but at a much lower cost. I'll be using EntirelyPets from now on!

Best Prices Around by kim from Ohatchee, AL02/22/2013

I have 2 dogs & little money & live in the country where fleas are terrible. When I found your website I could not believe how much money I saved & still save after 2 years of doing business with you.

Product works well with Trifexis by rox from Virginia09/04/2013

My allergic dog cannot take Heartguard for heartworms because the med is contained in a beef base, so he has to take Trifexis, which also contains a flea med. Since Lymes Disease is rampant in this part of Virginia, we must apply a tick preventative as well. K9 Advantage II provides the necessary tick control, but its flea med does not cause an overdose with that in Trifexis. The mosquito protection is also nice during our humid summers. The product is less greasy than the new Activyl.

Good product great price by hurricane from Crystal river , Florida11/07/2012

I look everywhere for a product I can afford for my 5 dogs. Fleas can be more than a nusiance in Florida, so I never want to be out. Fast shipping and sometimes free.

works every time by island girl from dauphin island, al11/11/2012

Advantix is easy to apply. No mess & it stops fleas & ticks!

Excellent Product by MG from Scottsdale, AZ10/29/2013

This product is very effective at controlling fleas & mites, on my dog.

best for my dogs by Griffy106 from Lak Balboa, CA03/19/2013

I tried other brands and my dogs still got fleas. This is the best product for my dogs so far. There was no irritation at the application site and my dogs don't freak out when i put it on them.

Works Well by Bearhall04 from Middle Tennessee10/23/2013

The k9 advantix II works well for my dogs. The fleas are minimal and we have not had major issues this season. It has worked great for our dogs.

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Simply Can Not Do Without It! by DSieckman from San Diego, CA03/03/2012

In San Diego, we have year round fleas and ticks. With K9 Advantix II I don't have to concern myself with stubbon beach fleas or ticks. They absolutely cannot tolerate this product! My pug Priscilla and I can hike and chase the waves without having to worry about pests!

by jeweleddragon from Bc01/09/2012

very happy with this product. works really well

K9 not working either! by Lori11/06/2012

Nothing is working this year. Frontline and K9 have failed miserably. I have spent so much on sprays for lawn, house, animals, pills, vacuuming... Dawn dish soap seems to work better than anything else and that only slows it down on the animals.

Would not recommend you use this. by LeeJ from Ottawa, Canada09/27/2014

I would not recommend anyone use this product.....K9 Advantix...both of my dogs got very, very itchy and one threw up for a day and a half....also was very sensitive to the touch. Horrible reactions....I am just lucky I washed them both 3 times with dish soap to get it off....and they recovered. Pay the price and use revolution. I have never had any reaction whatsoever using revolution. All over the internet there are dogs that have died or been very sick due to K9 Advantix. Don't use it.

Working as Advertized by TC05/21/2013

This product is working as advertized! Great to know that have some protection for the dog til November from tics & fleas.Have seen a mosquito yet mosquito biting season has yet to start.So do not know how it will work when they start biting. Although pricy,any dog deserves good protection! In fact would've given 5 star rating if not for being so pricy..Although thankx to "Entirely Pets" received a discount.

Great Product by DonnaLynn131 from Knoxville,TN07/05/2014

I have tried many flea and tick products over the years but K9 Advantix II is the best by far. I have three indoor dogs that sleep on the bed and are all over my home and furniture. This product works so well as long as you keep up with using it monthly. My dogs are not scratching and we are not dealing with fleas. It covers all the bases with fleas, ticks, and mosquitoes. My dogs are happy and that makes mama happy!

Great purchase by Lufta848 from Florida12/29/2013

Fast Shipping. Good communication. Highly recommended. A +++

No Fleas, Ticks, Etc. by Momo from Baltimore, MD06/11/2013

I have been using this product for over 8 years. As long as you stick to the 4 week timetable, I have never had any issues with fleas, and or ticks.

K9 Advantix II by Doxie Mom from Stockbridge, Georgia04/08/2014

I have used this product for many years. I have three young doxies that love to run and play in the yard for hours. I live in Georgia and the fleas and ticks are terrible here. We find ticks on the dogs, they are usually dead and fall off. This product works better than any other I have tried.

by teddy from Quebec05/29/2014

With this season a tick epidimec I find Advantix to be the best product available, and I being highly allergic to fleas I don`t worry about my dog getting fleas and that make me and my dog very happy.

K9 Avantix by Dee from Louisiana11/04/2012

Have used this product for some time and have had great results. Would recommend to a friend. Also the service is great.

best price by Marina b from Los Angeles, CA12/07/2012

have used this product before, but this is the best price that I had paid...

Bug Free by Sadie's Provider from San Antonio10/25/2011

This is an excellent product at an excellent price that was delivered exactly as expected. Thanks!

Very good product at a good price by sheltie mom from West Palm Beach, FL12/17/2012

K9 Advantix seems to work very well on my sheltie, even in South Florida, which is a nightmare of bugs! Other products do not work well here. Entirely Pets usually has the best price for this product.

Entirely Pets are a good online company by Kay from Kentucky05/06/2013

Never any problems with delivery or products purchased.

Love this product by candimeg04/24/2013

We have tried different types of flea/tick/mosquito protection for our babies and, by far, K9 Advantix is the BEST on the market. Would never buy anything else!

Works Great by Janice06/11/2013

The product does what it says it does. I do apply it the first of each month and we have never had a problem with fleas or ticks. I have used it for 2 years.


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