Put a quarter or a dollar bill or a tape measure in the pics for accurate scale...can be fun to use a kitchen weigh the big ones in grams too.I will also take comparison pictures to show our normal egg size.
Sexlink birds are more likely to lay many double yolks...it's pretty cool but not great for the bird long term.
HolyCrap!!!I have had a few over the years. One was an egg inside an egg and both had double yolks.
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