we have start changing no. 2 for my son. b/4 we want to change A+2 for him, but we think we do not want to take a risk for a no stock brand. so we try Snow no.2.
if you want to change no.1 to no.2,
you need to change the 1 time (must be in afternoon/lunch) first, if he can drink it, keep this for around 3-4 days.
then change the 2nd time..... like the below chart.
a a b a a a (3-4days)
a a b b a a (3-4 days)
a b b b a a (3-4 days)
a b b b b a (3-4 days)
b b b b b a (3-4 days)
b b b b b b (3-4 days)
almost around 2-3 weeks will be fully changing.
it's optional for changing no.1 to no.2, it depends on your bb's growth. if your bb is small size, then keep to intake no.1, no problem (coz more vitamin), but if your bb is big size, then you may change at any time (from 6-9mths or even 1 yrs).
my daughter is a 25% bb, so we changed no.2 when she is in 8-9mths old, but my son is a 95% bb, so we changed no.2 in 6mths & 2weeks.