I never personally used or had an issue with a ground walnut shell product in the past, but I remember that many did- with internally injured animals from "razor-sharp edges" as a result. So I almost posted about that & thank Armiyana for doing so, especially with more personal experience on that. I went & looked up this current product also, & it appears to be little or no risk- but as mentioned, beware of "imitations". Companies try to provide economical products that make sense to them, but there's nothing like real-life animal experience to test for safety.
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