So it's my first year raising ducks, and I have a "Rouen" (she was sold to me as a Rouen but I think she's a mallard) female. Today I found her sitting on a nest of four eggs. She had hidden herself in the ivy, and I only really knew she was there because she started hissing at me. She's not on the nest full-time, as I see her and her beau walking around the yard sometimes. Should I let her keep sitting on the nest, or should I take the eggs away? If I take them away, are they okay to eat? I don't want to find any surprises in the eggs.... Thanks!