Looking for Baby Ducks

This morning my duck nest was unattended and there were only 2 eggs in it. Last night after dinner the mama duck was still sitting on the nest so I am not sure what happen over the course of the past 12 hours. I later found 8 of the egg shells about 10 feet away from the nest in the backyard. They are all in approximately the same area and appear to look more like something broke out of the egg rather than into it. So I am hopeful that the ducks were hatched and lead off to the pond or creeks around our house. I will be on the watch today. I am sad that I did not get to see the ducks hatch but hope they are safe now.