DS has never eaten all that much at one time. The most he's ever eaten is maybe 3.5 ounces, but usually its around 2-3. One Thursday we started transitioning to Elecare due to a milk protein sensitivity. Ever since he's only been eating 1-2 ounces on avg. Maybe one bottle a day he'll take 3. There is only a little bit of the new formula mixed with the old stuff since we're slowly transitioning, and he doesn't get upset so I don't think its because he doesn't like the formula. He just either falls asleep or pushes the nipple out of his mouth. Should I be concerned? Yesterday he had a total of maybe 18 or 19 ounces.