I'm a FTM and breastfeeding my 10 day old DD. I remember reading about collecting the letdown from the opposite breast using a Hakka pump as well as expressing/pumping for bottle feeding. I haven't started expressing yet as I want to make sure BF is well established but thought I could try collecting any letdown. However, I don't seem to have any. The opposite boob is often full and stays that way until I switch to it for her next feed. Is the idea that I express/pump from it or should I just be looking to catch anything that comes out naturally?