THis afternoon, Sparky suddenly started walking backwards and opening his mouth so wide I thought he was going to be sick or something. He has not eaten in a couple of days since going into his new viv, although he did try a locust yesterday but did not finish the job. I put some crix in with him today and he almost ran away from the one I put in front of him. He doesn't go into his hidesor anything. I am concerned and is there anything I should do