My husband and I were looking for alternatives to pesticide usage on our cats and dogs. Natural seems to be the best route. This powder worked at getting the fleas off for at least a day. The fleas were back as usual.The powder is so fine that it doesn't stay on and creates a mess especially if used in the house. It gets on everything, including stopping our air conditioner up. It took two hours just to clean that mess up. It also makes you wonder if the powder is that fine, how much did my family inhale of this stuff? I still have a new container on my refrigerator, which reminds me that I need to toss out. Thanks.