I may have to do something like that, Sept!
I was just out in the garage with one of the cats, who kept scratching around his neck and head, and he let me search there, and sure enough he had a flea. He just had the Frontline a couple of weeks ago, but I've read you can reapply Frontline safely after three weeks. I may do that soon. It has always worked before, but I guess the boogers have developed resistance to it.
The constant vacuuming and mopping is exhausting, but it seems to help in the house, and today I again soaked the pup in a solution of Dawn and Adams flea shampoo, so he's free of fleas again, for now!
I'm going to research about yard treatments to rid fleas.
Patty