In my neck o' the woods, it's Frontline that has stopped working. Advantage is working GREAT. I have switched to Advantix for my dogs, because it's summer time.

I did a lot of studyin' before I got our flea problem under control. You have to use something that kills the eggs AND the larva and the adult fleas. Anything with an Insect Growth Regulator works (it has to kill the eggs!). We were forced to spray our yard every 10 days for about a month with heavy duty chemicals, while at the same time washing everything in the house over and over again, including the dogs and cats.

Bad flea problems cannot be solved with "natural products" unless you don't have anything else to do in your life but apply them over and over.

Karen