So, last month my "duck-sitter" misinterpreted my instructions and refrigerated 13 duck eggs that my muscovy duck had just started to sit on. They were in the fridge overnight. I was very unhappy when I got home. I let them warm up on the counter for half a day and put them back in the nest, and 34 days later we have 13 apparently healthy little ducks! I heard that worked for chickens but found no info for ducks so thought I'd put that story out there.