Hi mama! 120z per day ay medyo konti para sa 4-month-old, kasi usually around this age they need 24-32oz daily depende sa weight nila, so baka need mo i-increase pa ang feeds. One of my mum friends noticed her baby wasn't gaining well kaya kinuha lang ng pedi, at nag-adjust sila, worth checking with your doctor din para ma-monitor kung healthy ang weight gain ng baby mo!