Tag: oyster shells

Oyster Shells vs Crushed Egg Shells

The Better Choice Explained

Both oyster shells and egg shells can serve as valuable calcium supplements for chickens, but there are a few reasons why oyster shells are considered a better option. They are more easily digestible for chickens than eggshells. Oyster shells have a porous structure that allows for better breakdown, eggshells are denser and can be more challenging for chickens to break down effectively.
First, let’s understand why you may want to supplement with oyster shells. The purpose of this as a supplement is for the quality of your flock’s eggs. The high calcium content and digestibility of oyster shells contribute to better shell quality in chicken eggs, reducing the chances of shell breakage or deformities.


Calcium Content of Oyster Shells
Oyster shells generally contain a higher amount of calcium compared to egg shells. Calcium is a crucial nutrient for chickens as it helps in the formation of strong eggshells, supports skeletal health, and aids in proper muscle and nerve function.
Slow Release
Oyster shells release calcium slowly into the chicken’s system, allowing for better absorption and utilization. On the other hand, egg shells may break down more quickly, potentially resulting in a sudden influx of calcium that the chicken’s body cannot fully absorb.
Digestibility
Oyster shells are more easily digested by chickens due to their structure and composition. They contain a form of calcium carbonate that is readily absorbed by the chicken’s digestive system. Egg shells, although also composed of calcium carbonate, have a slightly different structure and may be less efficiently broken down and utilized by chickens.

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Thin Shelled and Brittle Eggs

Why and What to Do About It

About 95% of the egg a hen lays is calcium carbonate by dry weight. Over a year, the calcium she puts into her eggshells could equal 20 times the calcium that’s in her bones. So it only makes sense that a steady supply of calcium will help her stay healthy and produce strong eggshells.
I suggest ground oyster shells, and I recommend putting them in their own container so the hens can take what they need. They like them, they’re readily available in feed stores, and they’re not expensive.
Feed Variances and Calcium
If your hens are fed high-quality layer feed and get nothing else, their calcium intake is probably sufficient. But if they’re in the yard, fed table scraps and scratch feeds along with commercial feed, they are good candidates for a calcium supplement.
Note: Only feed oyster shells to hens already laying eggs.

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