An egg weights about 60g in average, and a hen 3kg, how the hen can produce every day something about 2% of it’s weight like this? Which kind of metabolism the hen have to achieve this?
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It’s not like each day, they create a whole egg. I used to raise layer hens. Occasionally one would need to be killed, for instance, if it had been badly injured by a predator.
If you see the inside, chickens have an egg “chain”, a number of eggs at increasing stages of development in them.
And, as others have noted, they spend the day eating, scratching the ground, eating and roosting when the sun goes down. Mine had a diet of rich gain feed, plus foraging in the garden.
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