Will mixing the wrong amount of formula milk harm baby's health?

Hi, yes it is very important that you measure the formula properly and prepare your baby's feed. The reason is that if you use too less formula and dilute it more with water, it will not provide your baby with the required nutrition. And if you add more formula than is needed, it can cause digestive or other health issues in your baby, especially if your baby is born premature or has low birth weight. Different formula brands have different measuring specifications, so read the instructions carefully before preparing. Hope this helps :)