I have eight eggs in my duck pen currently. When I went out to check if a female had gone broody this afternoon, I saw that she had thrown three of them off to the side. why is that? Some people are telling me that she knows they are not fertile, and some that there are too many eggs in her nest. I don't think there are too many in her nest, considering last year she hatched a clutch of fifteen. Also, She seems to be shoving all the eggs inside the walls of the nest she made...why is that?