yes..when ducklings first hatch they sometimes don't eat for a day or so, they're tired, hatching is hard work..and if she's laid several i'd imagine that they're all hatching around the same time..she won't take them out till everyone is accounted for..then she'll venture out to show them off. If it's a lake or pond though and there are snapping turtles..they'll get the babies..the wild mandarins on my lake rarely have any that survive..i'll see momma with 10, then next day, 7, then couple days 4...they go quick when they're tiny if they don't have cover.