Just be careful- like Jan says - because of their liver and its inability to process a lot of things (like most essential oils, fragrances, including scented candles and the like. If you applied Advantage II (NOT NOT NOT Advantage Multi) your fleas should be gone very quickly. Advantage II has a good safety profile and I can use it in very tiny foster kittens (just two drops of course). It kills adult fleas, flea larvae, and eggs. Now, if you feel like you have a bad infestation and want to do more - get Capstar. It will kill every flea on your cat within 24 hours and, in my experience far less time. It is safe for even very small kittens (one of the only things approved for tiny kittens of 2 lbs. ). As for your bedding, of course just wash it. You already have, I think. As for the couch. Just vacuum it and any rugs, etc. After you have given the Advantage a few days to work, you can vacuum again. Back in the day, we used to have to take our cats to the vet for a “flea dip and bath” and flea bomb the house. Put a chair in the center of the room and cover it with newspaper. Do this on every floor of your house. Set offf the bombs (mister/fogger) and get the heck out of the house and stay out for hours. Then come back inside and open up the windows to air out the place! Then go back to vet to pick up the cats and bring them home. It was quite an ordeal. And once I had a cat have a very bad reaction to their flea dip at the vet. She had to go back for an injection because she was hyper salivating and almost seizuring.
But those days of bombing the house are over now that we have better options. Still, I hate putting flea topicals on my cats and that’s one reason why they stay indoors. How did y’all get fleas anyway? Through a window? Sometimes if we don’t get the foster kittens de-flead or quarantined quickly enough we will get fleas. And then one pr two of my cats is sure to get flea allergy dermatitis and need a depo shot :-( because it won’t stop! And then I have to de-worm everybody with Drontal to make sure they don’t get tapeworms! It’s expensive and a hassle.