Frontline works wonderfully. It is really great stuff. I would buy at least 2-3 tubes of the Frontline PER DOG from your vet and then discuss with your vet on the best product for flea bombing the house. The Frontline is a monthly flea gell/liquid that you put between their shoulder blades and it gets absorbed into their skin and they are safe from fleas for an entire month.

Since my two pups have never had fleas since they have been with me as far as I know, I give them the Frontline every other month, instead of every month to save a bit of money. It's a bit on the expensive side but boy does it work great. They have never had fleas!