Is there a flea treatment we can use on 7 week old kittens? We have recently rescued 3 kittens and mother cat, they are almost fully weaned and will going to there new homes in the next couple of weeks and mother cat going to be speyed. They aren't scratching much but don't want to rehome them with fleas. We use Fibrospot on our other cats but this can't be used on kittens weighing under 1 kg.