Chicken or duck? Whose nest is it?

[harleyjo]

We have a nest of eggs and there are both chicken and duck eggs in it. Well my muscovy is sitting on it but I went today to check the food in there and found the chicken sitting on the nest and the duck sitting next to her.....I wonder what is going to hatch out of this?

 

[harleyjo]

Now I went out and the duck is off the nest. She has done this before and has been back within an hour or so. I hope the eggs make it.