I have the same problem as you... my bb also 2 1/2 months old and he eats 5.5 - 6oz of milk every 4 hours. But he seems like not enough co's when he finished the whole bottle and I took away the bottle, he cried badly, therefore I fed him water right after the milk. The doctor said that my bb already eat too much and within 2 months his weight gains more than double. Therefore I cannot add anymore milk.