There is no way of telling how much she is actually drinking. DD1 had a lower than normal feeds per day, we discovered at 3 months that she was drinking 280mls, by 5/6mths over 300mls when she had ebm and she was only 50th percentile, people were telling me not to give her so much They will have what they want and thats that, nothing we poor worrying parents can do about it.