Natural Joy, are you nursing those babies yet? I hope you are loving it and that things are going well for you and your new ones.
I just wanted to say that I am a 110% advocate of breastfeeding, but that anyone who has to supplement shouldn't feel bad, just as those who do have an awesome supply should be proud and grateful.
It is a dicey thing to make sure that bottle feeding doesn't interfere with breastfeeding, but it didn't cause a problem for me--my girls definitely prefer the breast unless they are really hungry, and I feel bad to have them be hungry. We did offer a bottle early, too, but always did breast before and after, and if anyone seemed to start preferring the bottle (Xanthe did some days), I just kept breastfeeding her all day whenever I could, and hid the bottle for that day.
Mothering twins is hard work, and lots of moms wouldn't even try to breastfeed, so I think if someone is able to mostly do it, they should feel quite proud of themselves. My milk supply is good, but I just can't make quite enough to make them full at the end of the day, and it makes us all a lot happier to have a little supplement some days and get a little more sleep. Sure, if I could get more sleep, my supply would pick up a bit, but that is not my reality. If I got up in the middle of the night to pump, my supply might pick up, but I'd sure be a grouchier mama if I had to get up any more at night. I could pump during work, but as I work for myself, any pumping time I take is just added onto my time away from home.
My point is just that it works for me to breastfeed 99%/90% depending on the baby, and any new mamas who read the encouragment that others are offering should not take that to mean that if they can't do 100% that they have failed or anything.