Is it possible for a duck female, to be breed multiple times. Without being able to produce a egg? I have two crested ducks, One male one female. That are separated from the rest of the flock, the male is delicate with the female. And has been mating with her for about two weeks. We have walked the yard, checked the duck house. Checked the Pen.. No eggs, not a single one! All our other ducks have been laying eggs for a month now maybe more.. Is it possible that she is unable to produce eggs?