Thanks every one for your advise, im gonna go see if i can find the 4fleas as recomended by"drawn to animals" and go and treat all of them.Iv checked with vets and he says to take to him when i collect and he will treat her with spray, i do own frontline spray but it says nothing about dosage(we use it for reptiles).The situation with these kittens is the usual couldnt be bothered to get spayed and now have kittens, im affraid it seems to be the way around hear.Yes 6 weeks is maybe a bit young to be taken from mum but again due to nature of mum(almost ferral)its advised to take sooner rather than later.All kittens are of very good weight and look to be healthy.(except for the fleas of cause).