I have dogs and they have fleas! I know this is nothing unusual, but they have never had fleas like they have now.They have been given baths with flea shapoo and still have fleas. Is there anything I can use that does not have chemicals? I would like to stay as natural as I can. In the past I would have used sprays, but not anymore. Does boric acid powder or 20 Mule Team Borax work? I heard you can use this on the carpet, but what about directly on the dogs? Does garlic in their food or brewers yeast work?Your help will be greatly appreciated. Thank you!