Eggs under broody hen

[FussyHen]

One of my ducks disappeared for three days, and I found her setting on a hidden nest in the yard. They are free range, only locked up at night (she's lucky a raccoon didn't find her). I haven't had ANY eggs in the duck house, so both girls apparently decided to lay in the hidden nest.

There are 8 eggs in the nest, so they've probably been there for 4 days.

Question: if they had been there longer, and started to spoil due to the heat of the hen (they're not fertilized), does the 'floater tip' hold true if they ARE going bad? Or is that mostly for older eggs? More curious than anything.

 

[lazy gardener]

The float test will only tell you how big the air cell is in the egg. It will NOT TELL YOU IF THE EGG IS SPOILED. If you want to eat them, you could always open each one up into a bowl, inspect and do a sniff test first. Or you could give them to the ducks or your dog!