Hi
the same is happening to me:
16 days ago we stuck 12 eggs under a broody
after a couple of days she had removed 2 eggs, but didn't eat them, so I guessed they weren't fertile. Then we found one with a hole in it and it had a developing embryo inside.
But since a couple of days she seems to eat one every night/early morning!
She goes out several times a day to eat, drink, poop and we've even put a bowl with food inside the coop in case she got the munchies when the coop is closed at night, but it's not helping.
We are now down to 6 eggs (from 12) and just a few days to go before they hatch, what else can I do??
Is she just extremely clumsy and breaks an egg every time she goes back on the nest and then just decides to eat it? Or has she turned cannibalistic?
Any help/advice is appreciated