If an infant is slightly deficient in calcium, supplementation can be considered. If the baby was breastfed for the first six months, the mother should consume more high-calcium foods such as beef, lamb, fish, and shrimp; if the baby is formula-fed, use formula with higher calcium content. After six months, the baby can be given supplementary foods, directly feeding them high-calcium foods, but these should be finely and softly prepared. Encourage the baby to get plenty of sunlight, aiming for two hours a day to promote calcium absorption.