RT eating dirt (and has a “black” tongue)

I got a health question from someone on Instagram. I corrected mostly everything she was doing. She fed her Russian Tortoise salmon, peas, carrots, and mushrooms. His main enclosure has no heat or UVB (it was a basket) about 1 square foot large. I’ve informed her with the correct information and she’s made him a secure outdoor enclosure and improved his diet. Though she asked me why her tortoise is eating dirt.. I’m unsure about that? She also claims and asks why her tortoises tongue is...

RT eating dirt (and has a “black” tongue)