You may also want to give him more time to get used to his surroundings. If you got him on halloween then it's only been barely a week. The move is very stressful for a snake and some take longer than others a calm down. Handling him so soon could agitate him even more and it may cause him to refuse food. I had a butter that acted that way for a month. I thought he was just going to be a jerk. But it took me giving him a hide and covering the sides of his tank so the movements on the outside wouldn't scare him. He's happy and inquisitive now.