I will get incubator photos tomorrow in the daylight, but I am wondering if I might be accidentally trying to incubate my homebrew OE's first egg.
I'd taken it for a Marans egg, though sort of wonky-shaped, being long and thin, and tucked it in just as an off-chance thing since the weight was good (I prefer to incubate 60g+ eggs, though will go down to 50g when I have a lot of fairly-new layers).
I noticed that the OE -- who hatched last Easter -- had FINALLY gotten a red comb and then I got another long, thin, Marans-dark egg today. It seemed weird that one of my FCM girls, who had been consistent layers of large, well-shaped eggs, would have two weird ones in a row.