I feed both my Kings, my Bairds Rat and now my two corns, since they moved up to small mice, in their vivs. They have yet to strike me when i open up the door to viv at anytime. Both the Kings will come racing towards the door when i open up but i quickly show them the back of my hand and they calm down straight away. The Bairds Rat is that laid back he barely flinches when i open up the door and both corns just sort of look about them when i open up the viv. If their is no prey scent on your hand, you shouldn't get bit. What i have noticed with Kings, that once you feed them and then put your hand in a short while later, whether it smells of prey or not, they will usually strike at anything that moves in their viv