I totally agree with Jibber Jabber! You'll do more harm letting LO cry for so long than trying to stretch the feeds out just because she's 12lb and because you think LO should be sleeping through the night IMO.
Babies eat when they are hungry. Not because they are greedy.
I was so obessed with trying to LO to sleep through the night because I thought that was 'normal'and what babies should do, and because all my friends babies were 'supposedly' sleeping through the night How wrong was I?!
Not all babies sleep through. My little man is on a 3 hour schedule - day and night! He has a bath at 8pm, massage and bed time bottle at 9pm. He sleeps until 12am, has another bottle and then another at 3am. He wakes for the day at 6am. He has these feeds because he is hungry.
I've only recently got the hang of it, but I've got feeding times down to 20 minutes each (it used to take me over an hour from start to finish!) so I get up twice in the night and its only for about 40 minutes in total. I just get my arse organised before bath time - it does get easier! If I'm lucky, after the 6am feed he'll go down for another hour but I'm generally wide awake then so I jump in the shower!
You mustnt feel bad - but you are your LO's Mum, no one else and if you think LO needs a feed - then do it.
Being a Mum is such a learning curve - I learn something new every day! xx