Ainsley,
usually when i bottle feed her, it will be a full feed and she will drink finish most of the time (140ml). Middle of the night feed was done by Ivy and my gal will take only 1 breast then she KO. Like this morning, i woke her up for full feed but she drank 100ml only so i leave her on the bed for "self entertainment". After 15min later, she begin abit cranky thus i know she want the remaining 40ml so i feed her. After the 40ml taken, i placed her on her cot n coax her a while and she fall asleep soon.