If you are planning on adding more ducks to your two females, Are they Drakes. ? If you have any more then 1 Drake, you will have a problem because Drakes will fight each other and to many drakes are not good for you 2 hens. If you want pets, then I would forget the Drakes. Unless you are going to eat them.
I sexed the ducks and apparently I actually have 9 hens and 2 drakes. One of the hens has a raspy quack halfway between that of a drake and a hen. She also looks rather feminine so I assume she's either a hen or a hemaphrodite.
I have 2 drakes because one is a backup. Sometimes a drake dies for whatever reason. . and I want ducklings.