My "logical" brain said that there was a good explanation. Everything was alright, and I would solve the mystery.
18 chicks. Gone! They were a few days shy of six weeks. Too big and too many to be taken away by a weasel. Even in the dark, I could see well enough to know they weren't on the roost, or under it. Not in one of the chickens' nestboxes... Where are those chicks?!?!
I Finally put my hand into the duck nest box. Why are the ducks so upset this morning, anyway?
No egg that I could find. I was pushing chicks left and right, pulling a few out (I held one. Ohhhhhh, she was so soft! ). Maybe the duck didn't lay.
The heat lamp is now unplugged. It is obviously not needed.
Aaahh duck chicken mama!