harrellkd
Chirping
Is the nest she is in movable? How long has she been broody?
Same thing happened with mine. One of the other hens laid an egg on her back just because broody was in the favorite nest box. I moved her to a completely new nest in a new coop at night with the eggs she had been sitting on. I waited until the next night and swapped out the eggs for ones I knew were fertile and healthy. She's been there four days now with no issues.