Frontline flea medication is spread across the body of an animal through a natural process called translocation which wicks the liquid into the hair follicles.
Many people mistakenly believe that it is absorbed into the bloodstream through the skin and that the fleas are killed when they ingest the tainted blood.
It takes about one day for the medicine to be spread across the entire body of a dog or cat, at which time it will become fully effective.
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