Hi! My baby boy is abt 1 mth old and recently for the past one week...despite feeding him 80ml of formula milk every 2 hrs he still feel very hungry and cry alot.we then up the amt to 90ml currently but the problem still remain.3 weeks ago,his weights is 2.5kg but now not sure. Anyone has any advice or solution? We just can't figure out why he is always not having enough.?