How Common Are Double Yolk Eggs?

[MKetter]

The birds haven't been laying for long, about a month, but I've had several double yolk eggs, white egg and brown egg, so I know they're from different birds. How common is a double yolk egg?

 

[BlindLemonChicken]

Pretty common when they first start laying. I even had a triple yolk once

 

[texsuze]

Belle, my young EE, has laid 3 double yolks since she began laying about 5 weeks ago. Those eggs are big-- I'd feel better if she didn't lay them!