Refused to finish her milk

At that age, toddlers often start getting more interested in solid foods and naturally drink less milk, so it could just be a developmental shift rather than something wrong. It is worth checking whether she is eating more solids at mealtimes, because if her overall nutrition looks balanced, 25ml may not be the whole picture. You could try offering milk in a cup instead of a bottle to see if that changes things, or spread smaller milk portions across the day. If she is also eating less solids and seems unwell, then a trip to the polyclinic would help put your mind at ease.