by colfre » Wed Jul 25, 2012 5:11 am
If it didn't work the first time, it's not going to work a second time. The cheaper "spot on" flea meds contain Permethrins which are less effective than Advantage or Frontline. I'd go to the nearest Petco or PetSmart or your local vet and purchase the Advantage or Frontline appropriate for your dog's size. It is well worth the money and you should be flea-free in a day or two.