If she went back to the eggs and is still interested in sitting on them, I'd chalk it up to an accident, remove the broken egg and give her a second chance, while in the meantime preparing an incubator in case it wasn't just an accident. Keep a close eye on her and be prepared to intervene if she leaves the nest again or if you find more broken eggs or other signs of trouble.
Well I asked in the other thread and many people said there was no need to move her and nest to another spot
Don’t move her, just put a chicken wire barrier around her to block access. It can literally be a loop of chicken wire encircling the area she’s in. That’s what I do and it works great. They can still see her and the babies and get used to the idea, but they can’t get to them. I only have 2 nest boxes next to each other, so when I blocked off the broody, the others lost access to the empty nesting box as well, but I made a temporary one out of a milk crate for them. They used it just fine. I blocked the broody off at lockdown and removed the barrier when the broody took the chicks out of the nest, on day 2 I think. There was food and water in there with them just outside their nest.
I surely wouldn't move her now, but other hens accessing the nest of a broody frequently results in lowered % hatch rates or incubation failure.
Perfect! Do remove the chicken wire as soon as the chicks leave the box though. They can fit through the holes and escape, but may not figure out how to get back in. I learned that the hard way.
Some of the girls are still getting in and getting in the nesting box. I guess they are flying over. I’ve just locked everyone out of the coop until I can hopefully fix it this afternoon
