Blue egg? Who layed cookie and cream or sultan?

[Bellacoop86]

Either my sultan or Lisa Steele cookie and cream is laying blue eggs. I dont know which one? Any ideas?

 

[Ol Grey Mare]

Neither should be, how have you become so certain that it is one of those two birds? Separate and confine both for a few days and you should see them each produce eggs in their confinement which would help you then know what they are laying