They have breast milk for the first nine to 12 months and then move directly to cow's milk. Commercial infant formulas are used when babies are not breast-fed. Formula also may be used as a supplement to breast-feeding when extra calories or more milk are needed. Formula should be made from cow's milk. The formula should also be iron-fortified to avoid low iron levels in the blood.
Low iron can lead to complications later on.
Always follow the package directions exactly. Concentrated liquids must be diluted with water before use . They can harm the baby if water is not added or if too much water is added. The term 'colic' refers to an infant who cries and fusses for a few hours each day in the first few months of life for no apparent reason. It usually ends by the time an infant is three to four months of age.