One of my 2 week old twins (6.5lb weight) likes his grub and is putting on weight very well. The midwives and health visitor said this is ok and we can't overfeed him. However he had a slight vomit & choking episode yesterday, and were told by the doctor it was because we were feeding him too much. Doc said 450ml of formula per day is about right (i breastfeed when they will take it too) but we were giving around 750 per day which was too much.