Can eggshell powder be used as feed?

Eggshell powder processing Eggshell contains 94% ammonium carbonate, 1% magnesium carbonate, and 3% to 5% protein-based organic matter. After the eggshell is processed into eggshell powder, it is a high-quality mineral supplement feed for livestock and poultry. When processing, just collect the eggshell, remove the sundries, wash it with clean water, boil it in boiling water for half an hour, then remove it and dry it and crush it to become eggshell powder. According to the needs of chickens and ducks, they are mixed into the feed in proportion to animal feed. Laying hens are fed 3.5 to 4.5 grams of eggshell powder a day, and eggshell powder can also be placed in a feed trough for chickens and ducks to eat freely. When feeding pigs, eggshell powder can account for 1% to 2% of the diet. Sheep and cattle herbivores can account for 0.5% to 1%. Eggshell powder can supplement calcium and adjust the ratio of calcium to phosphorus.

Is there any chicken feed formula for layers?
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