i cant remember how much roo was taking back then, its prob different anyway cos it was EBM... but my HV did say that you cant really overfeed such a young baby, and if they do take a wee bit too much it will just come back up again, & to just go with what they are asking for.. she said ideally there should always be a half ounce or so left in the bottle, so if hes draining the bottle each time add an extra ounce in, its only when they leave some in the bottle that you know they have had their fill...