Thanks everyone for your advice. I am pretty sure my husbandry is fine. It is set up the same way the previous owners tank was. I am going to make the hide box smaller though. The way they did it before was just putting the rat on a plate in the tank and leaving it which is what I did and he never ate it. I haven't handled him much and I blacked out the sides of the tank so he can't see me at my desk all the time.