Please know that you should never-even if the packaging says its safe- use flea/tick medications on kittens under 6 months of age. It can kill them. IF you have a little one that has fleas- the only thing you can safely do is wash them a couple of times a week with Dawn dish washing liquid. It won’t kill all the fleas, but, it will eliminate a lot of them. If the infestation is too bad, your vet may prescribe an iodine shampoo. Please, don’t medicate the little one with out seeing or speaking to a vet first. Your kitten will be around a very long time to thank you.