Question
How much formula should a 40-day-old baby drink to be considered normal?
Answer
Based on your description, your baby, at 40 days old, weighs about 7 pounds, and should be drinking at least 100 milliliters of formula per feeding, but you feel the baby seems unsatisfied and often wants to eat again within an hour. This situation might indicate that the baby is not yet fully satisfied. It is suggested to try increasing the amount of formula per feeding, such as starting with 120 milliliters, and then increasing to 150 milliliters if the baby finishes it all, and so on, gradually increasing until the baby is satisfied. Please make sure to follow the instructions on the formula can for proper preparation, and do not adjust the amount of formula or water on your own to avoid the baby being underfed or having digestion issues. Generally, babies of this age tend to defecate about every two hours; if the baby seems hungry within an hour, it may not be getting enough to eat.