I just changed. Don’t mix. In fact My baby have tried all the brands. Just because I want to find out which is best for his digestion. Just that when introducing new milk give a lil first. Then gradually give more.
I will recommending just changing to the new formula without mixing. When my LO was three weeks old, we changed his formula and he accepted it 😊
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change bid by bid.
mix old and new then slowly to the new. if u literally change it your baby might not react well. diarrhoea for example.
No, please do not mix. Try feeding a bottle of the new milk to see if your nb rejects it or not.