My little guy (16 days old) is up to about 3 oz every 2-3 hours... I've been pumping exclusively and my small stash I had in the fridge is quickly dwindling down. I only have about 7 oz back up right now. I'm doing every thing I can to bring up my milk supply. In the meantime I feel I need to be ready to supplement with formula.... This is very difficult on me as I never "planned" having to do this, but I know it's best for the baby right now.