# TLDR Review: K9 Advantix II for Medium Dogs

*Published: 2025-08-02 | Updated: 2025-08-02 | Source: https://shopsavvy.com/reviews-tldr/k9-advantix-ii-for-medium-dogs*

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## Product: K9 Advantix II for Medium Dogs
**Brand:** Bayer Animal Health

## Pros
- Effectively keeps fleas, ticks, and mosquitoes off dogs.
- Long-term users report consistent positive results.
- Reliable and superior to other products based on personal experience.
- Users describe it as an effective alternative to more expensive oral treatments.
- Works well for mosquito protection, even in tropical settings.
- Successfully keeps other pests like black biting flies away.
- Considered highly effective for tick prevention, especially in tick-heavy areas.
- Comprehensive protection, also includes benefits for heartworm prevention.
- Ideal for farm settings and beneficial even in environments like Hawaii with fewer ticks.

## Cons
- The high price point is a concern for some users.
- A reported skin reaction in one dog, causing twitching and itching, was noted but resolved after a bath.

## Bottom Line

Bayer K9 Advantix II is a powerhouse against fleas, ticks, and mosquitoes, with many users swearing by its effectiveness over the years. Though it comes with a higher price tag, its broad-spectrum coverage, including positive user experiences in tick-heavy and tropical areas, makes it a commendable choice for pet owners serious about pest control. Just be aware of possible skin sensitivity in some dogs.

## Pros vs Cons at a Glance

| Pros | Cons |
|------|------|
| Effectively keeps fleas, ticks, and mosquitoes off dogs. | The high price point is a concern for some users. |
| Long-term users report consistent positive results. | A reported skin reaction in one dog, causing twitching and itching, was noted but resolved after a bath. |
| Reliable and superior to other products based on personal experience. |  |
| Users describe it as an effective alternative to more expensive oral treatments. |  |
| Works well for mosquito protection, even in tropical settings. |  |
| Successfully keeps other pests like black biting flies away. |  |
| Considered highly effective for tick prevention, especially in tick-heavy areas. |  |
| Comprehensive protection, also includes benefits for heartworm prevention. |  |
| Ideal for farm settings and beneficial even in environments like Hawaii with fewer ticks. |  |

## Current Prices

| Retailer | Price | Availability |
|----------|-------|-------------|
| Petflow | $16.98  | Check |
| Pets Go Here | $17.98  | Check |
| WalmartPetRx | $17.98  | Check |
| Mercari | $21.99  | Check |
| Penwago Co. | $23.98  | Check |
| Petzome | $23.98  | Check |
| Beazox Store | $28.48  | Check |
| Allivet Pet Pharmacy | $29.98  | Check |
| Amazing Life Home | $29.98  | Check |
| hollywoodfeed.com | $29.98  | Check |
| PetMeds | $29.98  | Check |
| Petproducts.com | $29.98  | Check |
| Yow Pet Supplies | $29.98  | Check |
| Yow Pet Supplies | $29.98  | Check |
| StateLineTack.com | $30.39  | Check |
| Blain Supply | $31.98  | Check |
| Countrysidepet.com | $31.98  | Check |
| Pet Smart | $31.98  | Check |
| Pet Smart | $31.98  | Check |
| DailySteals.com | $31.99  | Check |

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*About this review: We pulled together findings from professional and user reviews, and cross-referenced them with ShopSavvy's pricing data from thousands of retailers to give you the short version.*