i always handle before and after feeding,pick them up and take them to there meat and after mine always have 5 mins of play with each outher so i just stick my hand in amongst the lot like another ferret,i get lots of play biting like this but i think it teaches them to trust your hand more,i also make a point of giving each kit some 1 on 1,most of them will fall asleep in the palm of my hand,there six weeks old now and i hardly get a nip ,apart from playtime that is