Ay, ito common worry talaga ng first-time moms like us! Usually makikita mo kung may rashes, excessive gas, o kung parang uncomfortable siya after feeding, some babies also get constipation or loose stool if hindi hiyang ang formula. A few of us moms noticed din na ang baby becomes fussy or cries a lot during feeds if something's off. Best thing is to observe for a week or two while keeping notes, then bring it up sa pediatrician mo para sila mag-check at maybe mag-recommend ng different formula, basta don't switch too quickly kasi it takes time din ang baby tummy to adjust. Lagi kaming nag-uusap about this sa mommy group, and honestly pag may doubt ka, better magtanong sa doctor para ma-rule out ang allergies or intolerances.