How long does a cat flea survive off the cat?
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Expert Answer
After applying a topical dewormer, fleas on the cat quickly paralyze and drop; some die on the spot, some later, and some may jump away, but all usually die within 2 to 3 days. After finding fleas, besides topical deworming, disinfect the cat’s living area to remove any remaining fleas and prevent reinfection.