I was originally told with this product that it was certain cedars that were harmful to animals, so I figured it was okay. Upon further investigation, I have found that there is no 'special' cedar that will not bother the respiratory system. It's the same as making a small animal live in a cage with cedar shavings. Not good at all. While I don't have as big a problem with beds because the dogs can get off of them, when you're spraying something on the dog it stays with them. I still have my bottle and if I ever do see a flea, I won't hesitate to use it, but I do not use it as a preventative. Actually, I don't use any preventative and have never had a problem. But I would use it if I ever saw a flea.

And yes, the fleas are becoming immune to topical pesticides. I've been hearing a LOT about Frontline not working.