I did a bit of reading and as you said, it's a healing type of mineral, and also like a binding agent. It mentioned something about keeps their poop firm and also protects against some toxins.
As long as it's something edible and in small amounts, and helpful to them, I suppose it's okay. LOL, when I see clay, I think of pottery, I didn't imagine it could be anything they could eat.
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There are only two rules at my house: House rule #1. Cats rule. House rule #2. See rule #1.
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