That’s great! I found out that previous owners are not always the best owners, by experience. It could be humidity levels. Ours sniff loudly a lot when she is hungry or smelling something in the house. Keep monitoring. Thanks!
red foot and yellow foots should have cypress mulch for a substrate not pine. That could be irritating the tortoise. I Zoo Med sells cypress mulch if you can’t get it in your area. And make sure it’s cupress mulch and not treated mulch. Good luck