K9 ADVANTIX<BR>55 lbs and over (BLUE)<BR>4 Month Supply FleaMeds4Less.com : Best Prices on Flea Medication for Dogs and Cats. FrontLine PLus & K9 Advantix. EPA/FDA Approved and Registered. FleaMeds4Less.com : Best Prices on Flea Medication for Dogs and Cats. FrontLine PLus & K9 Advantix. EPA/FDA Approved and Registered.