I purchased my Uro on Saturday. At the pet store he was very active, dancing on the glass, over the other uros in the cage, and just seemed lively. On the way home, he clawed at the box the entire way. Since then, he has been in his rock and will not eat. From what I've read so far this may be stress? I have put up cardboard around his glass enclosure to give him a little more privacy until he adjusts to his surroundings. Is there anything else I can do to help him adjust to his new home? How long can he go without eating?