Okay, mama made the decision for me on the unhatched eggs. When I went out to check on her, she had gotten out of the nest with her 10 new babies and was teaching them to eat and drink. She decided the other 3 unhatched eggs were done and she was right. I opened them and one was not fertile, other two appeared to have died before hatching but fully developed. Just too weak to get out I guess. Nature knows better than us. 10 out of 13 hatched, I'm happy! She's a good mama.