I use Frontline Plus but only on the cats IF the dogs have brought in a flea. The dogs are protected with Frontline and I have always used that product. I do have Advantage on hand as well. Since I have six cats, I like the Frontline because I can buy the large dog size (same product as the cat) and I use a needle/syringe to draw up the exact dosage for a cat .50ml. then take the needle off of course :lol3: and use the syringe to plunge the product on the back of the cats head. I use Frontline for indoor only cats.
For outdoor cats - I prefer Revolution. Fleas/ticks/mites/mange/worms - all in one.