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Bayer Animal Health
K9 Advantix II for Medium Dogs
Model: 81806063UPC: 724089060631
Lowest at Amazon
$34.48 at AmazonLowest at any Popular Retailer
$31.98 at Pet SmartWhere to Buy
Prices last updated: May 14th 2026 6:34 pm
Pros
- •Effectively keeps fleas, ticks, and mosquitoes off dogs.
- •Lonerm 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 ticeavy 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.
What Reviewers Are Saying
Praised
works well15%
good value5%
protects from mosquitoes5%
never had fleas10%
Criticized
price too high10%
doesn't work effectively30%
caused skin reactions10%
fleas returned quickly10%
📚More About K9 Advantix II for Medium Dogs
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