This is my first time keeping Runner Ducks, and at 20 weeks at least one of them has begun to lay. So far it's only been one egg a day, so I don't know if some of them are taking turns or if it's the same duck each day. The egg is smaller than the ones my Khakis & Pekins lay, and it's a lovely soft shade of GREEN! Do all Runners lay green eggs, or do I have an extra special duck? I am taking half of them to the county Fair on Thurs, I hope to identify this layer so I can be sure to keep her!