Thanks to everyone for responding. This message board has been a godsend. Last week at this time, I was feeling like a complete failure. Today, I had my 2 week old LO weighed (7lbs, 3oz at birth) and he was up to 7lbs 9oz. So he's definitely doing just fine. I would love to be without the shield, but it could be much worse, I see now, and I feel good that he is exclusively on the breast. And now I'm confident that he will grow out of the shield phase, but, if not, it's OK. Thank you for the support!