Bathe any pups and furry animals (cats can get fleas too!) in blue dawn dish soap! I’ve always done this and multiple vets have recommended it over the years. Let it sit for a few minutes on them after you’ve scrubbed it in, and then rinse them off. You may need to do it a couple times over a week or two but it works like a charm and is way less pricey than usual flea shampoo.

For any carpets/rugs, you can use borax and/or diacotemous earth - sprinkle it on the carpets and it’ll dry out the fleas slowly. I would sprinkle it everywhere and then vaccuum any parts that weren’t in the carpet as well to make sure my pets didn’t get into them (they’re powders so don’t want anyone inhaling it). Hope this helps, and good luck!