I just checked our local news web page and found a topic near & dear to most of us - keeping fleas off your pets. The discussion was "natural vs. chemical". A vet actually said the chemical flea stuff is safe because it's the same stuff sprayed on our fruits & vegetables. AAAUUUGGGHHH!!!!! My dear husband (not as convinced as I am about eating organic/local) read it - he's now on board. He saw what this "safe" stuff did to our poor cat one time (tremors and vomiting).