There are mongoose that attacks the eggs and little chicks. I've recently heard from a neighbor that she's seen a Hawaiian Hawk come swooping down and pick up a full grown chick, but I don't think that hawk could pick up the mother.
You could be right. I noticed that one of her chicks is injured. Something happened to the wing.
She was a beautiful caring mother. It's been two days since I've last seen her - I hope she reappears. Do you think she could be possibly laying again? I appreciate hearing from you. It helps me to understand chickens better and also knowing what other predators we may have around our neighborhood.