My BB had been drinking very little since he was birth. Till now he just drink 5oz for 6 meals. He move alot but eat little. I will feed him every 3.5 hrs ... if he is still asleep I will carry him up & feed him. Many people asked me to let him sleep cos sleeping can grow fat too but I'm worry that I will feed him less meal. Is it better to let him sleep? However sometimes he wil continue sleeping after the meal.