And with the chickens. I saw it with my own eyes this morning when I went to feed them and then later on. But my question is since Ive been reading about the fertility being low when breeding Muscovys with a common duck. Why is that? They have been mating ALL day. I know the ducklings will be mules. She has been laying eggs everyday and the one from yesterday and today I put in the chcikens nest and found them to be missing earlier. They were hiding way down in the bottom of the nest. Is this a clue that she is going to incubate?