What's eating (slurping) my duck eggs??

[duckthirty]

Please help! Last night we lost two muscovy

(out of 12 ducks). One was found in the corner of the pen with inureds mostly gone, with the rest of body and feathers intact. Second duck still missing.
Also out of 20 or so eggs only 4 recovered. Two had circle cutouts and yolk gone.(see pic)

please help

Thank you!

 

[BirdCrazy11]

It could be a rat/mouse or a snake. It also could be something like a baby opposum or a raccoon. But were your ducks and eggs in a coop/pen, or were they just in a yard. And if they were in a coop/pen was there any damage done to it?