Got two beautiful new kittens today, 8 week old brothers. They are absolutely riddled with fleas! I have flea combed each of them 3 times, do you think combing alone could be enough to get rid of them? I've managed to get hold of some flea drops you can use from 8 weeks old but they wash each other and I'm worried that they will lick it off each other and be poisoned! Has anyone else had kittens this young with fleas?