My son drink formula 3 oz each 3 hour sometimes he hungry like one hour again I give him 2 oz then another 2 hour drink 3 oz is that normal? And he’s not very cry person. He will show his mouth moving and fussy that all he dose I know that sign he’s hungry. He drink 4 oz at night because he will cry more if not finish 3 oz. I decide to give him 4 oz if he’s full and he easy sleep faster. That’s normal? Also he’s sometimes feeding after done he will spitting lit small not like never too much that mean he’s full? Or overfed? I’m little concerned about spitting