Phew so glad to see you on a much less heated thread lol, i use ADVANTAGE and i swear by it, its really great, i have heard frontline is just as good, infact its waterproof i think. Its a little more expensive too, but the expense is well worth it, i would not use anything else, some over counter ones are actually TOXIC to your cat, and flea collars dont work the same, no flea problems once you use advantage for you or your cat providing you use it according to instructions.