I am adding my follow-up story since I see people are still peeking at this thread. Our Legbar saw it through until the end. We didn't stick very many eggs under her since she was on the skinny & small side - not ideal for setting. I incubated the rest. Once they hatched, I snuck all the boys out to her in the middle of the night and brooded the girls. She was a good mom.
technically a success story, but I will note that since they are a lighter breed, it was very hard on her. She seemed to be nothing but skin and bones by the time they hatched and she started eating well again vs calling to her chicks. It took a while to get her condition back so she would lay again. I didn't allow her to set again after that.