I have a tortoise named Bibble( I’ve had her for going on three years). And Her shell has these strange indents on them and I don’t know what could be causing it. She’s still very active and everything else seems fine. I feed her leafy greens and some lettuce (kale, mustard greens, salad greens, romaine lettuce, etc) I don’t have a UVB light but could not having one be the issue? Does her shell look normal?