Can I mix cow's milk in my baby's formula?

Hi, yes you can mix cow's milk to formula milk. I hope your baby is at least 1 year old to introduce cow's milk. If your baby is having a hard time switching from formula to whole milk, try taking a gradual approach: Over a period of time, add a little whole milk to the prepared formula, slowly increasing the proportion of milk to formula until your baby completely switches to whole milk. Hope this helps.