Frontline definitely has not solved our flea problem and I am preparing to order Comfortis and Capstar. Am I correct in my understanding that Comfortis is the same type of thing as Frontline (but different ingredients) in that it is once a month and should kill eggs and keep the fleas away till the next dose? And Capstar just kills the fleas that are on the dog at that time? And they can be given together? I am assuming Comfortis should not be used until the Frontline has worn off though?