What types of solid foods can a 3-month-old baby start to try, and how to address the problem of insufficient milk supply?

Based on your description, a 7-month-old baby can gradually start adding a variety of nutrient-rich complementary foods, including eggs, fish, lean meat, vegetables, and fruits. It is recommended to introduce new foods in small quantities and observe whether the baby adapts well.

Infants are generally introduced to complementary foods around four and a half months.