For me, I collect the eggs, leaving them on a cool counter in an egg carton, and tilt one side up on something...like if it was turning...and then as the day goes I turn it slowly again...alternating the sides, then before I place my eggs in the bator...I do candle and check...them ....I did notice a double yolk in the large one, ...but I went ahead and placed it in after seeing that you tube video...
you tube video do a search...twin checks hatching
you tube video do a search...twin checks hatching
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