Does the baby sleep when he's not full?

If the baby is too tired and sleepy, you can eat a little milk and there will be sleep. You can not make sure whether the baby is full by whether the baby is sleeping. If the baby is small, it is mainly based on the baby's state to make sure whether it is full. If the baby sucking nipple strength is not large, but also did not concentrate on feeding, attention is not concentrated, this situation is mainly that the baby has been full.