THIS IS NORMAL.
Frontline is designed to kill as many fleas as it possibly can. It works by effecting the fleas nervous system and once the flea has been contaminated by jumping on to the pet it makes the flea spasm. This makes them highly active and is why they are so visible. Rest assured that these adult fleas will be dead in the next 24 hours. Fleas you continue to see are those that have hatched from the pupae in your environment.
It is also advisable to treat your home.
One adult flea can lay up to 50 eggs a day which drop off into your home where the life cycle continues. When the pet walks past the area the fleas jump on the pet. Frontline will eventually help to clear the environment but we recommend you use a good household spray with an insect growth regulator. We stock these in our stores. This will help break the life cycle by killing the eggs, larvae and adults.
If you would like any help with flea control for your pet please ask a member of staff. We have 4 trained SQP's qualified to sell vet strength Flea products such as Frontline and Effipro. Alternatively, visit our website for more information.