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Title: Advantage is best.
Review: I've tried Frontline, Advantage and Advantage II.I find Advantage to work best.Watch out for Comfortis!!! If your dog is on any meds for mange or who knows what else, giving it Comfortis could result in seizures, blindness or death. I lucked out and got my dog to ER on time. $1,500 and 3 days later, my dog made it, but can never be on Comfortis again.
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