Medium 11–20
K9 Advantix II Flea & Tick Topical for Medium Dogs 11–20 lbs., 2-Dose
Two aqua months, no long promises.
4 box sizes$35.62
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Best first trial
K9 Advantix II Flea & Tick Topical for Medium Dogs 11–20 lbs., 1-Dose
$19.97
Price set by the retailer and may change.
Shop NowThe only single-dose listing on the shelf — one aqua-band month for testing a sensitive dog before buying the season.
- One dose, one month: the line's only trial size
- The cautious-owner pick for first-time skin reactions
- Full five-pest coverage, same as the big boxes
- Graduates into the 4- or 6-dose once the dog approves
More from Medium 11–20
Medium 11–20
K9 Advantix II Flea & Tick Topical for Medium Dogs 11–20 lbs., 4-Dose
The tall-grass months, covered in one order.
4 box sizes$57.42
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Medium 11–20
K9 Advantix II Flea & Tick Topical for Medium Dogs 11–20 lbs., 6-Dose
Six months of quiet for under $13 a month.
4 box sizes$77.90
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K9 Advantix II Flea & Tick Topical for Medium Dogs 11–20 lbs., 1-Dose
Shop Now