I have a Muscovy hen that laid 15 eggs. She kicked 4 of the eggs out of the nest and settled down. She has been an exemplary momma so far. I could sleep in her nest, it is so clean and full of down. She is always very careful to cover her eggs when she leaves to feed. Her drake helps her roll the eggs and stands guard over the nest when she is gone. With 6 days to go, she suddenly kicked two more eggs out yesterday.
Does she know that those eggs are not developing? Is it normal for a duck to cull during nesting? I've never had a duck hatch out a clutch before so I have no point of reference.