When do you start to change formulas from a stage to another stage ? Example stage 1 to 2 , 2 to 3 ? Do you really wait till exact months or age to change to another stage ?
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If the stage one formula is finishing 2 weeks before the suppose stage 2 age, i will change to stage 2 I won't wait till exactly the age to switch over

J Xinyi
8y ago
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