My girl is also a 3 percentile baby. She had never drink more then 4.5oz milk a meal
When eating congee, it depands on her mood. Sometimes a full middle size bowl, but ueually just half. She got 1-2 cheese stick everyday as she love it very much.
She had never stop drinking mid-night milk, as I breast feed her at night time, I sleep with her and she can suck whenever she wakes up.
I think there must be some people big, and some people small, just let it be