7-8 hour stretches

The past two nights, baby girl had slept from about 1am to about 9. She wakes up and fusses a little, and I put the paci in and make a bottle. When I come back she is back to sleeping. We can play the paci game a few times, but really she does go right back to sleep. I've honestly woken her up at 9 because I feel like she needs to eat. Is this normal? Is it ok for her to sleep for that long of a stretch? She is 8 weeks today and seems totally healthy. She is BF and eats 6 oz per feed.