Advantage II Large Cat Vet-Recommended Flea Treatment & Prevention | Cats Over 9 lbs.Deliver total flea protection to your cat or kitten with Advantage II Large Cat. This vet recommended, topical treatment and prevention formula kills adult fleas, flea larvae, and flea eggs on contact within 12 hours of application meaning fleas can be eliminated before they bite or lay new eggs. Effectively break the flea life cycle, control existing flea and lice infestations, and prevent further infestations with one simple application. Advantage