[Marilize]

I know exactly how you feel. I have two Yorkies who kept scratching after they got fleas from my parents' dogs. I looked all over for a natural flea remedy and here's what I found:

Small quantities of garlic daily discourages fleas from drinking the dog's blood;
Diatomaceous Earth can be sprinkled on the dog and around the house - it is a fine powder and I found it very unpleasant (it smells like dirty dog, lol);
Some companies manufacture natural flea remedies and I've tried a natural oil one, but it didn't work for a heavy infestation and my dogs hate the smell;
Eucalyptus or Teatree Oil mixed with water can be sprayed all over the house - fleas hate the smell. These oils can also be added to their shampoo and conditioner;
In South Africa, they use Khakibos as a natural flea repellant. I haven't tried it yet, but it's next on my list of things to try.

We are just entering flea season over here and I am going to start getting my flea repellants ready again. I hope that helps. I want to add that although I tried all of these methods, the chemicals won in the end. We had such a heavy infestation that I had to take desperate measures when the natural remedies didn't clear things up quickly - I used Revolution for Cats (my vet recommended it). I am not planning to use it again though.