VetGuard Plus for Dogs 8 Month Supply (in 2 Pak) VetGuard Plus for Dogs VetGuard Plus provides cost-effective flea, tick and mosquito control for dogs. Demonstrated to have greater than 92% control of fleas within one day of treating your dog with VetGuard Plus for Dogs.* Kills and repels fleas and ticks for up to one month Breaks the flea life cycle Kills Flea Eggs and Larvae for up to 4 months - prevents biting adults from developing Kills Lice and Mites for up to 4 weeks For use on dogs and puppies over twelve weeks of age