hi - I have 8 RIR all laying nicely. I usually get one double yolked egg every day or so. It is always recognizable because it is about 1/3 larger than the others, and i'm always a little more eggcited to fry it up! 1) How are double yolks produced? 2) Is there a way to promote double egg production in hens? 3) Could I figure out which hen is laying it or could it be any one of them on some sort of a rotating schedule? thanks in advance for the info!