I know fleas have different life cycles and can stay “dormant” for several week, or even months. I made it my mission to learn all about them and how to control them when we got our puppy who was covered in them. We put him on frontline and took all the proper measures we should in the house and such. We finally got rid of them a few months ago which means he’s been flea free for 2 months. But then we went to the dog park just as he ran out of Frontline and picked them up again. Since the cost of Frontline is 3 times the price of the stuff you can buy at the store, we want to go that route. So my question is, is the stuff you buy at the store just as effective as Frontline or Advantage?