I do the 18 for 12 thing. I am in a farming/small town location and it works out OK. Some people only want the 12 large eggs and some are real happy with 18 pullet eggs for the price of 12. I do sort out the pullet eggs and do not sell the really small ones.
It is not that unusual for pullets to have problems with their eggs. Many things, like soft shells or no yolks or yolks only, seem to usually work themselves out fairly fast, but some, like the blood spots, can hang around longer. Commercial operations electronically candle their eggs so they don't sell eggs with these problems individually. They sell them to bakeries or other places that use eggs by bulk.
I boil my extras up and give them back to the chickens. By the time I shell them and take the yolks out of the whites, they don't look anything like eggs to the chickens.
It is not that unusual for pullets to have problems with their eggs. Many things, like soft shells or no yolks or yolks only, seem to usually work themselves out fairly fast, but some, like the blood spots, can hang around longer. Commercial operations electronically candle their eggs so they don't sell eggs with these problems individually. They sell them to bakeries or other places that use eggs by bulk.
I boil my extras up and give them back to the chickens. By the time I shell them and take the yolks out of the whites, they don't look anything like eggs to the chickens.