![Double-Shell Egg](https://www.cacklehatchery.com/wp-content/uploads/2020/02/Double-Shell-Egg-150x150.jpg)
If one of your hens lays a super big egg, it likely contains another egg inside. Such an egg is called a double egg or a double-shell egg and is the result of a reverse peristalsis contraction. How an Egg Is Laid To understand how this happens, you need to know how an egg […]
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