Don't worry about 啓園. It is not too bad because you gave her 6匙米糊粉. Abbie only take 2 匙. That's why she could drink around 30oz a day.
I only feed 2 spoon cereal and 1 small can of carrots / green beans/ apples/ sweat potatos to her each day. I don't know it is enough or not but she seems ok la.
It's good that 啓園 likes to drink water. The nurse in the nursery centre told me that water is the most important of all. Only if he drinks water, you don't need to worry him taking not enough milk.