I have had pet mice (Siamese) througout the time I have been breeding feeders. Our first two feeder mice (both boys) ended up being pets when the snakes went into their winter fast. They were great - quite intelligent (not as smart as rats) - trained them with cheerios, but smelly. I confine myself to females as pets now. The nicest thing about mice is that they won't jump out of your hands, once they are past the hopper stage. I also find they are much less likely to bite than gerbils or hamsters. They are so cute too. Congrats on your new pets.
Too bad about Nanook becoming a snack - he is a cutie, but such is life - especially once you have cleaned the mouse droppings out of the computer keyboard!