At present there is no scientific evidence to suggest that fleas have developed immunity to the active ingredient Fipronil, found predominately in spot-on treatments. Recent difficulties in controlling flea infestations have been attributed to an explosion in the flea population due to changing weather conditions. Effective flea treatment not only involves continuous year-round treatment, but also environmental control and regular vacuuming and washing of pet bedding, etc.
Yes! Prevention is the key with fleas and regular treatment throughout the year is the only way to maintain effective flea control. Different stages of the flea life cycle can remain dormant for many months waiting to hatch and re-infest your pet; therefore it is critical to use a treatment all year round, even in the winter.
Bathing or water immersion from 48 hours after treatment generally does not affect the lasting efficacy of spot-on treatments. If your dog or cat has been bathed or become very wet prior to treatment, it is important to ensure they are fully dry before applying the product.
Don't panic! It is possible to see some adult fleas on your pet after treatment because spot-on treatments aren't repellants. Emerging adult fleas from the environment (remember, 95% of the flea population is in the environment) may still jump on to your pets after treatment, but any fleas that do jump on will be killed within 24 hours. Environmental contorl is just as important as spot-on treatments for your pets. See our page Fleas at Home for more information.
If you have any questions relating to fleas or other parasites and can't find the answer on our Pet Flea File website, please feel free to contact us using the form on our contact page.