Changes in milk intake of babies at 1 and 5 months In the first few months after the baby is born, breast milk or formula milk is the baby\’s only source of nutrition. However, your baby\’s appetite and nutritional needs change over time. Five-month-old babies have begun to gradually enter the complementary feeding stage, which means they need more solid food to meet their nutritional needs. Therefore, their demand for milk will decrease. How much milk does a two- and five-month-old baby need to drink every day? Although five