Hi all. We recently inherited some ducks with our new house so this is all very alien to me. One of the females has been sitting on a dozen eggs for about fifteen days now. We came down this morning to discover two have been ejected from the nest, one of which is smashed. They are only a few inches from the sitting, hissing mother. I really don't think a predator has been near her and she was locked in the box containing her nest last night so she is the only suspect. Is this normal or expected behaviour in any way? Any help or reassurance would be greatly appreciated, I feel very responsible for the funny little blighters!