1. Introduction to infant complementary foods After the baby is born, breast milk or formula milk powder is its main source of nutrition. But as babies grow, they need more nutrients to support their development. At this time, complementary foods need to be introduced. Babies as young as 9 months old can already start to try a variety of different foods, but they need to pay attention to choosing foods that are suitable for their age and stage of development. 2. Complementary food suitable for 9-month-old babies 1. Shredded