I have used all of these products and I do like advantix II. But if your are leaving toward revolution I'd recommend trifexis I instead. It is oral instead of topical and does most of what the revolution does except if you read the fine print on revolution it doesn't actually do parasite prevention in dogs. Only in cats. Trifexis does heartworm, flea, roundworm, hookworm, and whipworm prevention all in one once monthly(not ticks). It is actually the same company that makes comfortis which is great too but only does flea prevention. Revolution and trifexis both are prescription drugs and if you haven't already you may have to establish a vet and get and exam and heartworm text before starting them. Advantix can be bought OTC now but the company won't guarantee the product and you won't get special promotions unless you get it at the vet( right now they have buy 6 get 3 free doses).
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