How To Make Eggshell Powder For Cats. Eggshell powder is a great source of calcium for your lovable dogs and cats. Break the eggshells up into small pieces, and grind them to into a fine powder in a coffee grinder, or put them in a plastic bag and use a rolling pin to grind them.
Remove your home made cat food mixture from the heat and allow it to cool completely. Place your mesh strainer over the container you want to store the eggshell powder in. Some people remove the membrane, but others don't.
To make the eggshell calcium powder for dogs, place the cleaned and dried eggshells on a sheet and put them in a preheated oven (300 f /150 c) for 5 minutes.
*many people prefer to put the vitamins into. To make the eggshell calcium powder for dogs, place the cleaned and dried eggshells on a sheet and put them in a preheated oven (300 f /150 c) for 5 minutes. I use both, first the grinder and then i make them into a fine powder with the mortal and pestle. And then you let them dry for a few days in a single layer on a baking sheet.