valeriet,
My boy also not a good feeder, always waste my milk. Daytime if my mum feed him, he will only drink 40ml cos eager to play with my mum. And when he is really really hungry, he will finish 130ml, but that is rare.
Steffi,
my boy is 6.7kg and 67cm, he lose 0.2kg when he was down with sore throat last week.