Pine toxicity?!

[CKfarm22]

If you try sand,,, opt for course sand, and the washed variety is less dusty.
On another thread that I followed, a person tried sand. They lived in a very humid area I think somewhere in Louisiana. Sand did not perform well for them. Switched back to pine shavings.
I do have some sand in my run area. It is in a covered portion of run, that does not get exceedingly wet. Sand drains well/quickly even when in wet area of run.

Thank you!