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- Mar 26, 2017
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I think cats need a vet checkup for a heartworm test before they take Revolution though, since it kills Heartworms. If the cat already has heartworms, it can be dangerous to use Revolution, at least that's what I read. I think feral cats don't like being picked up because if they get picked up in the wild, that usually means they are in the mouth of a predator.