I just noticed a white line on my thee toed box turtle! She has been kept inside since she was little. (Found her about a year ago) I don’t know if maybe this is normal. Just wanted to check. (She is eating and behaving normally) Thanks in advance!
I don't know much about Box turtles except they should not be taken from the wild when they are native
However, It looks pretty normal to me, don't see anything on it to be of concern. Keep an eye on it for any changes. I'm guess just growth.
Be sure to house her in a high humidity enclosure and a source of water she can swim in.