we have ticks real bad here in SC also. i use frontline too and it does a pretty good job, if applied correctly though. you shouldn't find any ticks "swelling" from feeding. it should kill them shortly after they attach. if not, you may have another issue there (application, etc.) between that and shampooing once a week with a quality dog shampoo that contains some type of surface tick/flea prevention and you should cut them down to a minimum. hth!