I recently posted the thread for advice on Flea control on dogs and what everyone was using to control and De-Flea their clients dogs if needed. I had a customer tell me that Listerine Mouthwash in a spray bottle would help to control and kill fleas. She uses it around her barn and she grooms Llamas. She says it controls bugs and helps to kill and control Fleas too. She sprays her Llamas with it and also and her Standard Poodle and he never comes in with fleas when I groom him. I havent tried it yet, but I bought a bottle of Listerine today just to try it. Anyone heard of this method?