Double-Yolkers

[9gerianMile]

So we got a first egg from one of my BCMs a few days ago... it was huge and a double-yolker. We got another one yesterday. I'm wondering how often she will lay these big eggs. Is it less frequent than those hens who lay "normal" eggs?
Pics of the first one:

The two darker ones look darker, but we needed the flash to make the pic come out...

 

[chickfamilyonsleepyhollow]

Last October we got 5 or 6 double yolk eggs over a two week period from our six red sexlinks that were 6 months old -- one day we had two of them

haven't seen any since