I need some serious help. I've tried Frontline, Advantage, and Revolution. Last year alone I spent over $400 on flea "preventatives" and nothing worked.(I have two long hair cats) We bombed our house in November and I re-applied Revolution and a month later Advantage and nothing. My husband won't allow me to bomb the house again and he said I should get rid of the cats. I need help in order to save them!!!