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Question from Kat Miller

what is the difference between K9 advantix and K9 advantix II

Our Vet Says:

Bayer, the manufacturer of K-9 Advantix, launched a new product on the market called K-9 Advantix II.
Advantix the original version has as active ingredients imidacloprid and permethrin , both insecticides.  This will protect your pet against fleas, ticks, mosquitos and flies.
Advantix II, the new product, has as active permethrin (insecticide) and pyriproxyfen (insect growth regulator). The second ingredient will prevent eggs and immature forms from developing into adults therefore it is better than the first one.
K9 Advantix II is similar to Frontline Plus.
Both products are once a month treatment and will prevent fleas and ticks for that time as well.


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I bought advantage 2 for my dogs. I have 4 and three of them weigh about the same. The smaller one weighs about 25 lbs. I need to know why the advantage is not working on them and also if you could recommend a flea and tick medicine that will work. They stay inside more than out. My girls are itching up a storm and I feel bad for them. Please help us. BTW Sable was a few months younger in the picture. Thanks, D. Ford ...?

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