You can give formula while
pumping to
breast feed but like others said it will be hard to keep up
milk supply. Make sure to get the right pump, my first wouldnt latch so I had to pump but I lost my milk by 8 weeks and had to supplement with formula the whole time. Turns out I didnt have the right type of pump and didnt do it enough. I thought I would have problems having a baby breastfeed but my son did and I actually found pumping more awkward.