Ah kaya mo yan, mama! Usually within 1-2 weeks ng formula change makikita mo na ang improvement, pero ang consistency ay importanteng obserbahan, normal poop for toddlers on formula ay dapat semi-formed to slightly loose (parang mashed banana consistency), hindi rock hard at hindi din super watery, and usually 1-2 times a day is healthy na, though some babies poop 3-4 times depending sa diet. A few of us mums noticed na ang transition period ay may slight changes pa rin even after two weeks, so don't panic if it's not perfect agad, pero kung persistent ang constipation or sobrang loose, definitely check with your pedia kasi baka kailangan pa i-adjust ang formula or may ibang issue.