How to supplement calcium for country dogs?

You can wash and mash egg shells and duck egg shells and mix them in dog food for dogs to eat. It not only supplements calcium, but also protects the environment, which is equivalent to waste utilization.

Eggshells are easier to chew, digest and absorb than bones.

Eggshell contains 83-85% calcium carbonate and 15- 17% protein, and contains many trace elements such as zinc, copper, manganese, iron and selenium.

Many of the main components of calcium supplements that people eat are calcium carbonate.