Susu formula

Eh, macam ada few possibilities ni, bisa jadi si kecil dah develop intolerance to that formula (maybe lactose or protein), or maybe the batch kena issue, or stomach dia dah mature and sensitive lah. A few of my mum friends experienced similar, tiba-tiba lepas setahun, baby diorang cirit after formula yang sama jugak. Best check dengan doctor to rule out any infection or allergy, then maybe try switching to different formula to see if it helps, tapi let the doc confirm dulu why the sudden change.