We keep seeing posts where people claim that they don't live on sand and the natural range of beardies is tightly compacted soil, clay rocks, etc. Here is a veterinarian in Australia with the analysis from a lab that confirms that much of their territory is sand.
.https://www.facebook.com/BeardieVet/videos/293343184599851/
.https://www.facebook.com/BeardieVet/videos/293343184599851/