I'm so very sorry about the duck Quackers,

I know she's very much happy swimming in the pounds of rainbow bridge.

Please don't give up on your other duckies, they must be out there somwhere!

A member from another forum let his favourit duck out, she had flighted wings so she was able to fly around and come back, but one day the man came home and she was gone .. never showed up for 8 DAYS!. One day he seen a pound and in that pound his little girl was swimming in, she had been there the hole time, he tried to grab her but it was no use. The next morning she was outside the coop and lucky enough he got her, now she's in her pen safe and sound.

So maybe your ducks seen another flock of wild birds and followed them to another area, there probably near water OR if your lucky someone else found them and is now keeping them in there coop. I would post up signs around and hopefuly somthing will come threw, if some predetor chased your birds there's no way it could attack all of them at once.