A once a year treatment in your home and car with this product will do the trick:
Natural food grade diatomaceous earth flea and tick treatment information. And more information:
Increased Scrutiny of Flea and Tick Control Products for Pets | Pesticides | US EPA Here are a few ways to keep fleas off naturally:
Chinaroad Lowchens of Australia - Ticks, fleas, bees, flies, snakes and other gremlins! And how to deal with them!
Most dogs that eat mainly commercial pet foods and treats are more than likely to have a different odor to them that attracts fleas and ticks. A good healthy real food diet builds the immune system and combats these critters.