I have 4 month old baby, for first 3 month he used to ask me milk during night waking up and crying. But now in 4th month he is sleeping at night like an adult. He sleeps at 12-1 pm and wakes up at 6 or 5 for milk. Weigh gain is normal but he is not chubby but strong and height is higher than normal. Morning 4 hours once he is drinking. Since my breast feed is not sufficient, I am giving lactogen each time after breast feeding. Is it normal that he is not drinking at night. Or should I wake him up and give once.