Chickens have 9 lives, as RC once said.I'm really happy too, it's been a surprise in the good way. She just laid a second normal egg this morning!
With my ex-batts it hasn't been at all like what is said that when you notice signs of a chicken being unwell, it is already often too late. I can't count the times I've seen them get well when it looked like they were very ill. But on the other hand I didn't expect the two that died, because they had pulled out of it many times before.