Does K9 Advantix II Work? Check the Large-Dog Fit First
Worth it if the label fits
Worth it or skip it?
Worth it if
- Your dog is at least 7 weeks old, weighs 21–55 lb., and you want a topical treatment for the listed pests.
Skip it if
- You haven't confirmed that your dog's weight, age, package version, and intended pest protection match the label.
Key facts
Large-dog weight rangeThe listed large-dog version is intended for dogs within this stated weight range.
Waterproofing waitThe seller advertises waterproofing after 24 hours, so do not rely on that claim before then.
A conditional yes
Choose it when your dog is at least 7 weeks old, weighs 21–55 lb., and you want topical protection for the listed pests. The protection and timing statements are seller claims, not independently verified results.
Buy on AmazonThe label-fit moment
A small drop treatment sits ready for a dog who lands squarely inside the 21–55 lb. large-dog range.
What the topical formula claims
This topical formula combines imidacloprid, permethrin, and pyriproxyfen. The seller claims protection against fleas, ticks, mosquitoes, biting flies, and lice, plus flea killing within 12 hours; waterproofing is advertised after 24 hours.
The real decision is label fit first, then whether this topical format matches your pest-protection plan.
Before you choose
What dogs is this version for?
The listed large-dog version is for dogs weighing 21–55 lb. and at least 7 weeks old.
How is it applied?
It is a topical drop treatment advertised as fragrance-free and waterproof after 24 hours.
What pests does it claim to address?
The seller claims protection against fleas, ticks, mosquitoes, biting flies, and lice, with fleas killed within 12 hours.
Full spec sheet
| Brand Name | K9 Advantix |
|---|---|
| Unit Count | 2 Count |
| Age Range Description | 7 weeks and older |
| Included Components | 2 |
| Item Type Name | Topical |
| Model Number | 86314940 |
| Manufacturer Part Number | 86314940 |
| Item Form | Drops |
| Scent Name | Unscented |
| Dog Breed Size | Large |
| Pet Type | Dog |
| Target Species | Dog |
| Item Weight | 9.07 g |
| Volume | 5 ml |
| Allergen Information | Allergen-Free |
| Active Ingredients | Imidacloprid, Permethrin, Pyriproxyfen |
| Product Dimensions | 1 x 4.38 x 4.75 inches; 0.32 ounces |
| Manufacturer recommended age | 1 month and up |
| Brand | K9 Advantix |
| Scent | Unscented |
| Item Volume | 5 ml |
| Color | Large Dog only |
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