Pest problem? Address the issue at the source - your cat! Elanco Advantage II - For Cats Over 9 lbs. is an easy-to-apply topical solution that kills fleas in multiple stages of the life cycle. It treats existing issues and prevents future infestations. It kills fleas within 12 hours of application. Advantage II works on contact, kills re-infesting fleas within two hours, and is waterproof! Pest problem? Address the issue at the source - your cat! Elanco Advantage II - For Cats Over 9 lbs. is an easy-to-apply topical solution that kills fleas in mu