i have a male,female pair of ducks but there are no eggs. They are past the age at which they start laying eggs but there are no eggs. They're not in a very good pen (there new one is on the way) they haven't had a "coop" until last night we finally gave them a makeshift coop/box type thing. Could that be why she hasn't laid any eggs yet? What can effect duck egg production. They are Pekin ducks.