FRONTLINE PLUS^®, FRONTLINE TRI-ACT^® and FRONTLINE^® SPOT ON kill fleas by affecting their nervous system, making them hyperactive before dying. These dying fleas often rise to the top of the pet’s coat and bounce, so if you see fleas after treatment, it’s often a sign the product has got to work. Find out more about why you may still see fleas after treating your pet.

If you have any concerns, please contact our technical services team at petsuk@boehringer-ingelheim.com or your veterinary surgeon.