I have a duck, Elsa (Muscovy)that is sitting 5 eggs right now, she is in her 10 day. I also have 6 of her eggs in the incubator. Her last nest of eggs didn’t produce any ducklings. I know that the eggs in the incubator are fertile and growing but of course not sure about the ones in the nest. I would love to add my 6 eggs to her nest, when would be the best time to do that? She is a good sitter. Thanks