How To Make Eggshell Powder For Cats. Place your mesh strainer over the container you want to store the eggshell powder in. Preparing egg shells is easy.
Please note that most food processors or blenders will not grind the eggshell finely enough. Some people remove the membrane, but others don't. If you want, you can use a funnel between the strainer and container.
In a blender or coffee grinder, grind the eggshells until they become a fine, white powder.
You can also use a blender for this, but i find that a coffee grinder makes the finest powder, so you don’t have any large eggshell pieces in. Therefore, since it has a lesser amount of phosphorus, it is good for cats that have kidney issues as it won’t have to overwork it to get rid of the excess phosphorous and it makes it easy to. Ground eggshell can be used as a calcium supplement. And then you let them dry for a few days in a single layer on a baking sheet.