My dogs are getting fleas and ticks even using Frontline Plus or K9 Advantix. Any ideas?

Don't you just HATE that!? And when you complain to the vet, he sez: 'You must be applying it wrong." BS! I had the same problem. Get most any flea shampoo, use it, then bomb your dwelling with a flea bomb. About 3-6 mos later, the other products (Advantix, Frontline) should mysteriously start working again. Weird, huh? Good luck :)