We have three baby ducks, about two weeks old. One of them can't walk today.
We can't see any injury, and we don't know of any way it could have been hurt. They're in a cage inside our house. So sad to see it flopping around. It's still eating and drinking and seems healthy otherwise, though. It's quite happy floating, so we let it spend most of the day in a basin of water.
Is there anything we should do for it?

Is there anything we should do for it?