Permethrin is the active ingredient in Rid, Provent-a-mite and Equate brand bedding spray. All are used to treat reptile mites/snake mites. Everything I have read about it says it is extremely toxic to cats. I currently use Natural Chemistry Reptile Relief for mites (Amazon.com: Natural Chemistry Reptile Relief: Home & Garden) Is the natural chemistry efficient or am I wasting my time? If I need Permethrin, how can I safely use it in my 2 cat household?