My son is now 7 months. He seems to not want to eat very much of his bottle. He does ok with his food, but he just wont eat a bottle except for in the middle of the night. He used to eat about 24oz of formula a day, and now Im lucky to get him to eat 15oz. Has anyone else had this problem? Should I contact my pediatrician or is this normal and he will eat when he is hungry.