I own five dogs: three Boxers, a Lab mix, and a Pit mix with a flea allergy. For fleas, the best thing we have used is the Comfortis pills.
My Dalmatian benefits from Advantage the most. You can order it online and have it delivered.
For our Laborador Retriever, we have relied on Frontline Advantage for flea and tick control. It is a great product.
also see Flea Medicine for Dogs
also see Canine Flea Treatment Examined: Rinses, Sprays and Collars
also see Developing a Flea Treatment For Dogs
also see Flea Control