I think A+ is OK, but my child's doctor says A+ no. 4 is too 熱氣, he says we can stick to A+ no. 3. Also, he says we can 開稀啲 because A+ is too sweet. He says it is OK because when the babies are old enough they actually depend mainly on table food, so it is OK to 開稀啲, overall I think A+ is OK at least to my child.