Tag Archives: Double-Shell Egg

What Causes a Double-Shell Egg?

What Causes a Double-Shell Egg?

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… Continue Reading