the pair in pool are the odd couple. i started with 2 rouens supposedly 1 turned out to be a mallard both were drakes than couple days later i got 2 supposedly khaki campbells turned out to be pekins females.lost the mallard (vanished) his mate (the pekin outside of the pool) got depressed and i lost her so my 2 ducks are now mating and got my first duck egg august 24 she lays daily but she's not sitting on them. any suggestions on what to do?