Just saw that this thread had been bumped so I'll give an update. We did get the fleas controlled with the Revolution topical and after the first month we just stuck to the one product. We also had to give Bridger a course of antibiotics since he had developed a bit of dermatitis from all the scratching that he did. Poor dog. We will not go back to Frontline. It simply doesn't seem to work and we wasted a bunch of time waiting for it to do something/anything. If the fleas come back this summer I'm going with the oral that Hutash recommended.