There is a transition in the milk formula. Generally speaking, you need to change your baby’s milk powder every 6 months. 0-6 months is a segment of milk powder, 7-12 months is a second segment of milk powder, and 12 months or more is a third segment of milk powder. The type, content and proportion of various nutrients in different segments of formula are not exactly the same, and the taste and texture of formula are not exactly the same. If you suddenly transition from one segment of milk powder to two segments or have two segments to three segments, it will easily lead to gastrointestinal maladjustment, indigestion and cause abdominal pain, diarrhea, vomiting, loss of appetite and other symptoms. And the baby is not used to the taste of the new formula, resulting in refusal to eat.