I did candle the eggs yesterday. There were a few that didn't look good, and a few that still look like they could hatch.
I've been putting duckling feed close to the nest, and the water isn't too far away. I just went out a little while ago and found that she had kicked out one of the bad eggs (had a crack). I also scooted the adult feed closer to the nest, and poured some more duckling feed. That really upset her! She attacked the bag of food as I was pouring it. After that she left the nest for a bit, but I think she may have gone back, so maybe she'll try to hatch the eggs that are still good. She's obviously still checking them out since she kicked out the bad one. I guess we'll wait and see!