Hay ang sweet, 6 na agad si baby! Honestly, better to check with your pedia on that one kasi bawat bata may different needs, pero most of my mum friends say around 3 years pa lang kailangan talaga ng formula, by 6 usually regular milk na sila or coconut milk, unless may specific reason. Since meron ka pang one, pwede mong i-finish yun bago mag-switch, pero really ask your doctor lang to be sure with your bb specifically, okay?