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Frontline is worthless nowadays. Fleas and ticks have become immune to it. Advantix isn't much better (same chemical, different brand). Vectra is what I've used the last 2 years and it works well...so far. Just one application in April/May is all you need for the year. Don't believe the 'monthly' part...it's just to get you to buy more. In all our years of using the back-of-the-neck treatments, we've ever only used it once a year and it works just fine.
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