

🛡️ Keep your best friend bite-free and thriving—because every dog deserves premium protection!
Bayer K9 Advantix II is a topical flea, tick, and mosquito prevention treatment designed for large dogs weighing 21-55 lbs. It delivers fast-acting, contact-based pest control that starts killing fleas within 12 hours and provides waterproof protection for up to 30 days. This 6-month supply is veterinarian-recommended and offers broad-spectrum defense, including mosquito repellent benefits not commonly found in similar products.













| ASIN | B004QN0M2S |
| Batteries Included | No |
| Best Sellers Rank | #43,339 in Pet Supplies ( See Top 100 in Pet Supplies ) #50 in Dog Flea Drops |
| Color | Red |
| Customer Reviews | 4.6 4.6 out of 5 stars (11,223) |
| Date First Available | 7 August 2012 |
| Item Form | Topical |
| Item Weight | 9.07 g |
| Item model number | 86315092 |
| Number of Items | 1 |
| Product Dimensions | 19.69 x 2.54 x 10.8 cm; 9.07 g |
| Quantity | 1 |
| Size | 6-pack |
| Volume | 1 Quarts |
| batteries required | No |
A**N
I recently moved from the cooler, mountainous region of SC to the warmer climate of middle GA to attend graduate school. I had been using Comfortis for two and half years on my dog, Fluke, without any problems. However, about two weeks ago, I felt a lump on her neck, and upon inspection, I discovered a tick. I began looking all over her body for more of these little pests, and found four more of them. Fortunately, Fluke is a rescue from a vet, and I don't have to bear the burden of expensive vet bills when something like this situation occurs. I was told that the Comfortis does not necessarily guard against ticks, and while it may have been effective in SC, the tick population in the heavily wooded river area in which I live now might be too much for the tablet to protect against for Fluke. I bought this product because it proffered to prevent ticks from attaching to the dog, and thus far, it has proven quite effective. Fluke, as her name suggests, is an unusual 25 pound lab/pit mixture. I purchased the product in the larger size because she is in between the medium and large dosing sizes, and I wanted to be sure that she had adequate protection. Fluke has been her usual happy self since I applied it to her. The directions indicated that you should apply in four to six spots on the dog, and I chose to apply to six, as to not have too high of a concentration in any area. I know that some people have reported having adverse reactions upon applying this product on their dogs, but I have noticed a trend in the reviews: most of the reviews are concerning smaller dogs. It might be that the formula is just too much for a smaller dog, but I'm not anywhere near an expert on the topic, just something that I have noticed. I am of the opinion that what it boils down to is this: all dogs are different, and what works well for one dog does not necessarily work well for others; the same could be said of medications for people, too. I'm just happy to have chosen a product that works well for Fluke. On another note, if you only need flea prevention, Comfortis is amazing, and much less messy than the topical products. While searching for more ticks, I never did find a flea on her! I hope that my review could be of some help, even though it is not very specific. UPDATE AS OF JULY 2013: I have brought home a 4 pound Pomeranian since my original post. I stand by what I stated in my previous post: this product works well for fleas, ticks, and mites in the warmer climate of middle Georgia in which I live. Barnaby, my little Pomeranian, has not had an adverse reaction to this medication, and Fluke, my lab/pit mixture, remains free of fleas and ticks, all the while not exhibiting any negative symptoms. For my little Pomeranian, I applied the medication to 4 separate places along his back, again to not have too high of a concentration in any one area. I purchased the smallest dose currently on the market, and although it was a little high for his small stature, it did not seem to phase him in any sort of negative ways. I wait, at a minimum, 72 hours before bathing my dogs, and I also do not bathe them for at least 5 days prior to application of the medication, as the oils within a dog's skin distribute the topical treatment. My dogs tolerate this medication well, and I have not found a flea or tick on either of them since I began using this product; however, I still will caution potential purchasers of this product: this product may not work well for your dog, just as some medications may not work well for you. Please, before you condemn the product as unsatisfactory, try to determine, and this may require the aid of a veterinarian, what your particular dog requires based upon breed, climate, and tolerance to topical flea prevention. I can only relate that this product works well for my larger dog and also my smaller dog within the area in which we currently live. Again, I hope that my update as to the effects of this product upon my smaller dog is helpful in your search for the right fit for your dog.
A**R
I have used this product for years. I only had a problem with it once and the manufacturer and I could not figure out what the problem was but they stood by there product and forwarded me another box. I have never had another problem with the product and will continue to use it. I live on a farm and we have major insect problems which this product has worked to address.
J**.
My ten year old dog has never had fleas or ticks in all the years I have used this product. However, every time I apply it to my dogs back his hair feels extremely greasy and thick until I give my dog a bath. It also causes his back to be very itchy.
A**.
We‘ve been using Advantix for years because it is a true repellent. Most other products are only effective once a tic or flea ingests the dogs blood, this one prevents the bite. I prefer not having fleas and ticks in my house, even dead ones. The repellent is also effective against sandflies and mosquitoes, which serves as additional prevention against heartworm and other diseases. Our dog is tolerating the spot on well, we‘ve observed some mild scratching for a few days after applying it but no real side effects.
L**A
Good for dogs
Trustpilot
1 month ago
4 days ago