We had the sad death of our dear Mrs. Campbell (khaki Campbell duck) while she was sitting on her 12 eggs. We rescued the eggs and I believe they are still alive as I have been candling them and see life inside. The question is, I don't know how old they are exactly. On line I have only been able to see a 18 day old egg and they are definitely past that stage. I know I need to stop rotating them and add water for moisture around 3 days before the hatch - but I don't know when that will be. What do I do? Help me! I wanna save these babies and pass on the legacy of their Mommy.