Aw, switching formulas can be tricky talaga! A few of us tried going cold turkey at first, pero nakita namin mas okay kung gradual lang, mix mo yung old formula with the new one for around a week or two, slowly increasing the new brand's ratio until pure na siya, para hindi ma-upset ang tummy ng baby. Pero mamsh, since every baby is different, mas okay siguro makonsulta mo ang pedia mo para sure kung okay ba yung brand na gusto mo at kung gaano kadali dapat i-transition based sa age at health ng baby mo, especially if may sensitivities pa!