My son is 4 months 25 days old. He weighs 7 kg. he is completely top feeding. He is talking  100 ml per 3 hrs. I used to feed him in mights  while he was asleep to maintain the schedule but was told by his doctor not to give feeding in the middle of the night as the stomach should be empty for 6-7 hrs for good digestion. But will this less feeding have effects on his weight gain? should i stop giving him feed in night? please advise.