DD2 is nearly 4 weeks old. On wednesday she was weighed and is 8lbs 10 oz. She was 7lbs 14oz at birth.
The HV commented that that was a big weight gain but didnt make too much of a fuss. I checked to see what she should be taking and found a guide oine that said 2.5 ozs for every lb in weight.
So if I round her up to 9lbs thats 22.5 ozs a day.
She is taking 4oz bottles every 3 hours. Sometimes every 2. So shes taking between 32 and 48 ozs a day 
Is that something to worry about? Should she really be that hungry. She had been bringing some backup. But she hasnt for the last week now.