We know FFO works, but we had one family use too much. There house looked like it had snowed inside. FFO is inert so you can't use too much but you only need to sightly sprinkle the rugs. She said her pet was also wearing winter white. Just a little next to the skin is all it takes. If fleas come in contact with it, they die. So there is no need to switch to white rugs and furniture. You do have to leave it in for a week to catch all the hatching fleas. For dogs, a spay bottle with some FFO suspended in water should to the trick. If you have an outdoor pet you may need to use FFO in the yard as well. Its very good for your plants and its good for you too. I take a table spoon a day and my hair and nails are grown faster and stronger. Its microscopic so a small amount gets into your arteries and viens and cleans them out like a roto rooter. Also clean out the colon and reduces oder. Remember its listed in the Food Codex and is FDA approved for human and animal consumption.