How do you take care of a pinky mouse?

Answer 1

Pinkie mice (meaning an unweaned mouse pup only days old) are best cared for by their mother. If she is present simply keep her well fed and stress free and she will do the rest. If mama is not around it is very difficult if not impossible to keep a pinkie mouse alive for more than a few days as they demand around the clock feeding and warmth.

Answer 2

It has no mother? Well, you could try using another female mouse to raise it. If that doesn't work, your only resolution is to buy kitten milk (or baby formula with soy milk powder) and raise it yourself. Keep it warm with plenty of ripped up tissues and keep it near something warm; a lamp or hot water bottle with a towel over the top. Pinkies have a very little chance of surviving without their mothers care :( Use some of the kitten milk/baby formula and pour it into a pipette (with a tiny end). You'll have to feed it every 1-2 hours, including at nighttime.