Ah another person with FrontLine now not working. Try Advocate or Stronghold which are both very good. I think you need a prescription for both but I'm sure I'll soon be corrected if I'm wrong. For me, cheap doesn't work, FL is a perfect example as a treatment that no longer requires a prescription and has got cheaper and cheaper. Better to be safe than sorry and if your dog is kept in the house then you will need a R.I.P. spray because your furniture and carpets will be infested as well as your dog's bed and anywhere it lies. No good treating the dog if you don't treat your home at the same time. Good luck.