Hi, I am new to raising ducks. I have 5 (2 Cayuga, 2 Buff and 1 Rouen). The ducks have started laying eggs but have not built a nest. I find the eggs randomly laid (1 or 2 at a time) around the yard. Is this normal? Don't ducks normally build nest to lay their eggs? I'm very confused by their behavior. Thanks for any information that you can give.