Cow milk could be given when the infant is more than one year old, otherwise the infant may develop an allergy to milk and milk products if the cow milk is given too early.

Moreover, the protein content of the cow milk is higher than that of the breast milk which can also give problems to the baby. Cow milk contains almost the same components of the breast milk. However, the amount of some components varies considerably and the antibodies which must protect them till they develop their own immune system are absent in cow milk.