My son has a black lab and she got case of fleas. He wasn't sure it was fleas because he treats her monthly with frontline. She was in the process of developing mange, he had her to the vet a couple of times but he hasn't go a lot of money, he lives on disability, so I went on line and found your idea of borax and peroxide. He tried it and she is as good as new. We thank you so much we can't tell you how much. God bless you and your work. He also put cider vinegar on her spots as you recomended.