Hi. During day times I'm feeding my baby for 30mins in 2hr intervals. He too use to cry and wake up for feeds if the time exceed more than 2hrs.But during nights he hardly cries for feeds. sometimes he use to sleep for 3hr 30mins without crying for feeds. Is it normal? Even if I try to wake him and feed, it's of no use cos he just use to keep mouth idle and sleep. So in nights I use to feed him only when he wakes up. Is that fine?