What do you guys think about the crushed walnut substrate for a hognose? I wanted to try something besides aspen to encourage burrowing. I have heard that ingestion of the walnut shells can cause severe damage to the GI mucosa, but I always feed in a separate container, so there are few worries about ingestion by that route.
Here is the substrate I'm using: http://www.zilla-rules.com/products/...nut-shells.htm
Any thoughts are appreciated!