
Feeding is the most difficult part of taking care of newborn mice.
What to feed them: Powdered baby formula. Make sure to use a soy based formula, because mice can not properly digest milk. I used 1 part formula to 3 parts water when feeding.
How to feed: Purchase a syringe. Put lukewarm milk into the syringe and push against the mouse mouth. Slowly release one drop at a time, If this does not work try soaking a cloth or cotton ball in the formula. The mouse will usually suck the formula from the cotton ball or cloth.
The mouse will eat every 2-3 hours and once every night for the first week.
In the second week, the mouse will need to be fed every 3 hours, and once at night.
Once the mouse gets to three weeks they can start to drink normally but should still be fed formula. Place the formula in a bottle cap placed in the cage. Make sure to replace the formula 5-6 times a day. Also, provide another dish with water.
Between 3 and 4 weeks the mouse will be able to eat on it's own. Start of by crushing mouse feed and placing it in a dish. You can also include cut up fruit and vegetables.
Once the mouse shows comfort eating dry food, you can stop providing formula. From that point on they will just need mouse feed and water.