Ensure your dog is protected from fleas this summer! Fleas can lead to parasites and other major health problems, so protection is important. K9 Advantix is a once-a-month waterproof treatment that repels mosquitos, fleas, ticks, biting flies and lice. It can also be used to treat dogs that currently have fleas as it kills all life stages of fleas: eggs, larvae and pupae. As always - check with your vet first before trying any new product on your pet. Some pets have adverse reactions to flea treatments, so once you apply, monitor your pet to make sure everything is ok for 15-30 minutes after application.