Ducks Swim and Dig in the Mud.

The ducks don't seem to mind drinking water with another duck in it. They start digging in the mud too.

We had to split the males/drakes and females because the number of males.

Female ducks have to outnumber the males from what I read something along the lines of 5 females to 1 male.

If you don't the females will die from mating.