my 9 month baby drinks only 90 ml formula milk in one go and at night he use to wake up after 2.5 hours of drinking 90 ml but drinks on 40 ml of milk it is normal or leading to some digestive issues

A. Child is not very hungry in the night maybe that is as a child is satisfied with small amount of milk also if you look at it your child is generally having very less amount of milk can have around 210 ML of milk to approximately 250 in one go in this age so the amount is actually reducing only but if the child is eating well and gaining well then it’s not a problem