I found a few ideas on how to get rid of fleas on pets
Thought I'd share them in the event anyone is struggling with fleas this season
If the kittens have fleas, then they are in your house. Oil of American Cedar Leaf is what I've used for years with great success. It is a bit costly, and you put 2-3 drops on pieces of brown bag in every corner of EVERY room in your home. Within a week, all fleas were gone. You can get this at LoRann Oils at www.lorannoils.com/. I bought a bottle 3 years ago and still have a bit over half the bottle left. After fleas have gone, put a couple of drops on the brown paper every week for a 'flea free' home. Make sure it is cedar leaf and American.
Several years ago, I had found a kitten with fleas. He was sick and anemic. The Vet had told me to use PALMOLIVE DISH DETERGENT. I did and it worked. That along with feeding him chicken noodle soup help him get better.
Lime juice not from concentrate works on my kittens and cat. I put a couple drops behind their ears.