Understanding the flea life cycle
By routinely protecting your pet with FRONTLINE® Spot On you are breaking the flea life cycle. Remember, FRONTLINE Spot On is effective against fleas for up to 5 weeks in cats and approximately 2 months in dogs.
If you start treating when your pet is suffering an infestation you might occasionally still see fleas on your pet even after you’ve applied FRONTLINE Spot On. Don’t worry, it doesn’t mean the treatment’s not working. You are simply seeing new fleas that have hatched from the pupae in your home.
The fact is, there is no product available to kill flea pupae. But once the pupae have hatched into adult fleas which jump onto your pet, FRONTLINE Spot On efficiently kills them within 24 hours. It’s just a matter of waiting for all of the pupae to hatch (this can take several weeks or even months) and ensuring that you continue to protect your pet with FRONTLINE Spot On.
95% of a flea problem is in the pet’s environment in the form of eggs, larvae and pupae.
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