Milk powder is luck that does not need digestion, and breast milk does not need stomach digestion, so they are not wrong. But if you start drinking millet soup for your baby when it is only three years old, this is really not recommended. The baby's stomach is underdeveloped, delicious, and afraid of hurting his stomach.
Some people may say that babies used to drink rice soup or noodle soup. In fact, rice soup, noodle soup and millet soup are different. Think about it, the rice in the rice soup is actually cooked by adults, and it basically doesn't need to be digested by the stomach. Some just let the baby drink the white rice soup in the rice soup instead of eating thick soup, and the soup is the same.
However, the millet you cooked with millet soup is still the same, one grain at a time. When feeding the baby, the millet will be eaten by the baby, and he may not be able to digest it, so pull it out directly.
I don't know how many months children should eat millet soup. It is better to try to be late. The book says that children can't start adding complementary foods except milk powder until they are six months old, so you might as well wait until the child is six months old before adding these soups to him.