I purchased my baby Ball Python about a month ago.the first week, he didn't do much moving around and he didn't eat. After the first week, he was doing a lot of moving around in his tank, but mainly at night. But, for the past 3 days, he has not moved from the inside of his log. I know he is alive, I see him breathing, but he has not moved from that spot in three nights, tonight will be the forth night and I am really worried. Is this normal, or should i do something?