If they were partially zipped when she got up they just plain could have got stuck. Sorry they didn't make it. I have had a few broodies. My best being Amelia AirHeart, sizzled silky, who loves to sit. She sits on her own eggs but she won't let a roo near her so they are completely infertile! Go figure! So, I just stick eggs under her....and she sits and sits and these little babies hatch which look nothing like her and she loves them to death. Hysterical...She's jet black...her babies are a white serama, a lavendar Aracauna and a blue silkie. I had put a svart hona under her that was seriously stuck in the egg and she hatched him out. He died a few days later. He lost fur getting the shell off. My incubator failed that day and of course I had the most expensive eggs in there I have ever purchased~This is the first time for Sophie and for us with a chicken hatching her own. So all of this is new to us. She's doing great mothering the chicks.
I didn't candle either one I should have. They still didnt hatch so I am going to just egg-topsy them tomorrow and get an answer as to what happened.
My two other hens were complete failures. My creme crested legbar would sit but the girls would lay on top of her and she had like 14 eggs under there. we had to mark them but the pencil would keep wearing off the egg. Finally, I candled them and none were developing and our production in teh whole house had gone to nothing! So, off she went and eggs to the burn pile. She took a lot of breaks...I would find those eggs chilled all the time!
So, Amelia is sitting again on two eggs. I am sure are infertile. I am trying to think of what eggs I want to put under her. All of my chicks hatched this month so I have like 30~UGHH
I have not hatched any more light sussex...maybe one or two.