During a cold, both babies and adults generally prefer liquid food over solid food. Babies who haven't started on solid food should drink as much milk as possible. For those who are beginning to eat solid foods, in addition to drinking more milk, you can also appropriately increase their intake of plain water and rice porridge. Older children, besides the aforementioned, can also appropriately consume some light soups and can increase their intake of fresh vegetables and fruits. These can be made into vegetable purees or juiced according to the baby's needs. Babies are more prone to dehydration when they have a cold or fever. To prevent dehydration or treat mild dehydration, fresh apple juice can be used as a substitute. For moderate or severe dehydration, seek medical attention promptly; the doctor will take necessary measures for rehydration.