Formula requires a baby's digestive system to work overtime as baby tries to digest something not specific to the human body. Formula is harder to digest than human milk; thus formula-fed babies tend to go longer between feedings. There is absolutely nothing better to give to your baby than your milk. Formula certainly has a place in infant feeding, in certain situations, but shouldn't be used whenever mum's milk - either directly from the source or expressed - is available. Before you know it, your baby will be sleeping longer anyway! Why shouldn’t he have the best milk available (yours!) along the way?