Join Date: Aug 2010
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The company that makes Frontline states that Frontline is only guaranteed to work if it is purchased directly from the vets office. The company does not guarantee that Frontline purchased from discount places will work.
I started out with Vectra--my pup had horrible reactions to it. Thrashing for over 30 minutes, seeming to be in agony. Unable to be distracted. It got worse each time so I stopped using it pretty quickly and donated the rest to the vet to pass out to other people. The last time I used it on her, I promptly put her in the bath to wash it off since she was reacting so badly to it. My pup's friend, who is a shizu, has no issues with it whatsoever. I now use Frontline plus and it is tolerated somewhat better.
Vectra is good; I wish my dog did not have such a negative reaction to it.