My 11wk old has 9-10 feeds a day, which totals to about 1-1.2 litres (36-44ozs) in 24 hours. The longest she'll go at night is the first stretch from 8pm - 12/1am. After that she'll wake up for feeding every 2-3 hours.
I'm going to talk to the HV on friday, but has anyone switched to formula for hungrier babies at this time? I'm concerned that it gives them a higher chance of constipation, but wonder if it will help her go longer between feeds. Or does her feeding pattern sound quite normal? I'm not worried about the waking at night as she goes back to sleep, but she's obviously getting quite hungry.