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- #11
You are right.By "MARBLE" I assume you mean the material that statues are carved from and not those cat-eyed round glass balls that little boys play with. The mineral known as "MARBLE" is in fact limestone, calcium carbonate, or just plain old oyster shell. Mineral marble has undergone a long and intense period of heat and pressure while buried underground. There use to be a brand of chicken grit known as "Marble Grit" that also served as a substitute for oyster shell. So yes mineral marble is fine for chickens but I question what is meant by "DUST"
English is not my mother tongue and sometimes it is hard for me to express myself using the language correctly.
I have a C2 level of knowing the english language, but I am not a native speaker.