They are fertilized, but they were freezing each night since she wasn't broody and setting on them yet.
I had to throw them away
And since the nest was out in the pasture and there are foxes, skunks, and cats running around, I don't think it would've been a safe place for her to hatch them...
I followed one of my Cuckoo Marans hens today and found a nest that she had made in a bunch grass. There were Leghorn eggs, Marans eggs, and D'Uccle eggs in it. I was wondering why I wasn't getting enough eggs for the number of hens I have! Now, they are in lock down, no free-ranging for a few...