Hi, we have 2 left over 4h ducks here at home. I have a basic 'biology' question that perhaps i should know but don't 
If we have a male and female ,which we do, when she starts laying...does it mean they will always be fertile eggs? And if so, they are not to be eaten right?
If i want duck eggs (along with our layers which we have) should I just get females to keep here? thank you very much.
ps, is it possible to train them to be less frightened? I would love to interact but as of now(they are about 4 months old)they run away from us

If we have a male and female ,which we do, when she starts laying...does it mean they will always be fertile eggs? And if so, they are not to be eaten right?
If i want duck eggs (along with our layers which we have) should I just get females to keep here? thank you very much.
ps, is it possible to train them to be less frightened? I would love to interact but as of now(they are about 4 months old)they run away from us