My daughter is almost 4 years old. She always has the A+ formula (奶粉) (No. 2 & 4) but recently she started grumbling that No.2 is not tasty and wanting to have only No. 4. But we can't give her only No. 4 because, by experience, her poo will become very hard.
We are thinking about another brand of formula for her and would like to ask for your opinion about which one is good for 4-year-olds?
My son has been having Snow Brand #3 since he was 1.5 yrs (now 3 yrs 10 mos). He has no problem.
Basically, kids over 3 yrs can have any kind of formula as it is only a supplement. Sometimes, I would give other brands (free samples) to my son if we go out.
You daughter's poo problem may not come from formula, but maybe not enough vegetable and fruits. Besides changing the formula, you can try to put less scoops of formula in the water so she drinks more water.
Her poo problem was pointed out by a doctor to be related to the formula. She was having No. 3 A+. We followed his recommendation of switching back to No. 2 and the problem was instantly gone. Later, we thought as she grew up it might still be a good idea to take No. 3, so we started giving her 3 for breakfast and 2 for supper before bedtime (she had 2 rounds of formula every day). She has since had no overall problem (just occasional difficulty in going poo-poo).
I buy your opinion that as the formula is just a supplement to a kid my girl's age, many brands should be okay. BTW, is Snow Band = 雪印?