Hello! My 7 week old came 4 weeks early, but is exclusively breastfed. She used a nipple shield until 2 days ago and ever since has been nursing without one. She is still learning how to latch so nursing sometimes takes a bit of time. I'm very good about making her nurse at least every 2-3 hours, but often during the day she eats back to back. I feed her on demand whenever she wants.