Ive tried all i can with my baby, but it doesn't seem to work.:/ I'm giving her the colostrum & formula feeding her as well. 50/50
It b will happen slightly slower pumping, because the suction doesn't mimic a babies. Have you tried using a nipple shield?
It comes when it comes but are you opening her mouth wide enough? With my son i put my thumb and index fingers in his mouth to open it wide until he could do it himself. And he breastfed until 18 months without biting but he did scratch me once on my stomach but no big deal.