Do fleas and ticks have to bite my pet for ITCH flea to start working?

As a monthly preventative product Itch flea doesn't require fleas or ticks to bite your pet to work. It kills on contact working through the parasite's outer shell. If your pet has an existing active flea infestation the parasites will already be biting your pet until the product is applied and starts to work. We recommend routine applications each month to ensure ongoing prevention. We'll send you your treatment exactly when your pet needs it.
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