To start with, I'll make it clear that I know my body can produce a full supply, as I exclusively nursed my last child.
For many reasons, I started out combo feeding my second baby. It made things much, much easier in the beginning- but now, she is starting to be awfully screamy after drinking formula. If I can pump and give 50/50 bottles, she does much better... but then I'm pumping during the day, rather than directly nursing her, and I find that it hurts my supply more than I'm willing to allow.
She nurses at night, and has no issues. She also nurses during the day, but I've trained my body to only produce about half of what she needs during the day, and that is now a problem. Also, because she never spent all day on the breast, she doesn't like to nurse past finishing the first letdown- and I know that nursing on a, 'empty' breast is a large part of what tells my body to produce more. But she pulls off, and I'm not about to force her and create negative associations.
So... anyone bring in a full supply 1 month postpartum, without going to extreme lengths? My choices are start the quest for the formula that she can tolerate, try different bottles, etc... or up my supply. I prefer to increase my supply, of course. I currently make about 2/3 of what she takes in.