. Now, she is 4.5kg (around 12 pounds). She was 3.18kg (7 pounds) at birth and has gained 5 pounds so far. Is it too fast? How heavy are your babies? She can eat 6-7 oz per meal (6 meals a day), she will eat less at midnight. How about your babies? My baby is fed on formula only and has poo poo every 2 days.