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Well, limestone is basic, meaning the opposite of acidic. Materials similar to limestone can actually be found in antacids like Tums. So in small amounts limestone is not poisonous to a dog or anyone for that matter, it will just temporarily lower the acid content of the stomach. However, limestone should not be fed to a dog or encouraged because it still is not good for a dog to be eating or digesting straight limestone in any quantity.

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16y ago

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