Aside from that, if your baby is old enough to sleep through the night and really isn't taking a full feeding, then he is using the bottle to put himself to sleep. Unfortunately, he may continue to demand a feeding every time he becomes slightly awake in order to put himself back to sleep. This is known as Trained Night Feeding . Sleep is a necessity, but how we go to sleep is a learned behavior. If you want your child to sleep in his own bed or crib without feeding or other interventions you have to teach him to put himself to sleep.
Normal sleep is punctuated by many periods of arousal.
Adults look at the clock and groan and go back to sleep. A baby who hasn't learned to put himself to sleep will awaken and demand whatever intervention he has learned to use to put himself back to sleep. Between 6 and 8 months, most infants start to develop separation anxiety. Separation anxiety will add significantly to the difficulty of getting a baby back to sleep in his own crib. For that reason, I recommend getting infants used to going to sleep in their own cribs by 4 months of age.