Say buh-bye to pesky pests and keep your pup protected with K9 Advantix II! This Vet-recommended flea, tick, and mosquito treatment and prevention is effective in killing fleas on contact and starts working within hours of applications. Repel pests and prevent bites with just one fragrance-free, waterproof application each month! Subpaw easy and stress-free – there's no better way to keep your furbaby safe and sound!