my son also the same, I forced him to drink 30-32 ozoc per day, now he is 5.5 months old, but he cry a lot during drink, finally I use 45 mins to 1 hr to finish drinking process...
Before I told you guys that I gave my son rice water mix with milk, he can drinks more. But these few days, even he use rice water, he drinks very little, so what can I do now?