Double yolker guinea egg, common?

[EdistoChicks]

My daughter was thrilled my guinea hen laid a huge egg and it had two yolks. Is this a common occurance? I have never seen a guinea egg so big!

 

[Larry33843]

Double yolks must be fairly common. My girls are only five months old and of the 100+ eggs we've gotten so far, there have been at least a dozen double yolks. Their eggs are still small, even for guineas, but those double yolks are still egg-citing to find.