Double yoke eggs

[joanm]

Someone down the road from me advertises double yoke eggs. Do some chickens lay just double yoke eggs? If not, how does she know they are double yoke?

 

[silkiechicken]

It's a mistake on the hens part but I don't think they will do it consistantly. If they did, that type of bird would be eliminated from the gene pool since thoes eggs couldn't hatch into chicks!