My vet recommened "Revolution" for him as a pup. It is also a heartworm preventative and comes in liquid form. There is another brand that comes in pill form (which I cannot remember) that comes in pill form for dogs 5lbs and over. He said that he is getting a lot of cases where dogs are coming in flea infested and they use Frontline or Advantage. I guess the fleas are starting to out smart us!
