Grit or oyster shells?

Den in Penn

8 Years
Dec 15, 2011
SE Pa.
Oyster shell is soluble, meaning that it will dissolve in the acidic environment of a chicken's digestive tract. A chicken would have to ingest some with each meal. That would put a lot of extra calcium into them. An insoluble grit, like granite lasts over a much longer time before the gizzard's grinding will make it too small to be of use as a chicken's teeth.

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