Hi, I have had my Horsefield tortoise (Shelldon) for quite a few years now, and its now a habit that he scratches the sides of his terrarium, I originally thought he just wanted to go out, so every once in a while (pretty much daily) I take him out and let him roam my room (wish I had a garden). For the first 3 minutes he just tries to find a way back into the terrarium and then just roams around. Still confused why he scratches the walls so often. Please help