Pumping is NEVER an indication of supply amount you could not respond well to the pump even if it's only on one side that doesn't respond well. If you're nursing and pumping and baby likes that side more then baby is draining that side and you can't pump what's not there. Your supply is most likely totally fine. If baby is happy and healthy there is no reason to worry. My left side produces on average 3oz more then my right side. It's common to have a more active side even if baby doesn't have a preference

when I pump I get very little on that side.. but on the other side I get almost 1oz every time.. @californiahaley

Maybe it has more then you think. Why do you think t produces less

You're getting just what he needs. When I first started breastfeeding my right boob had a better flow than the left but he loved the left boob. Now I'm just getting over having too much in both.

I get very little out of it.. and that is the boob that my son likes the most for some reason.. @californiahaley

Are you sure one is dry and not just that it's a small producer