Try giving him nan1 once in a day in a small quantity continuously for a week in combination with prenan because some infant react little bit late on certain formulas. If he start taking it after a week then it is fine ,otherwise you can continue with prenan till 4 month and then after 4 month start weaning with combination nan2 or prenan . Its better to consult me directly so that we can discuss directly and can plan a weaning diet for your baby. There are many formulas, you can try that also once, may be your baby is okay with anyone of them
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