Hes approx coming upto 2 yr old. Ive only had him 1 week .hes only just started eating again. The problem is ive cleaned his viv out, put a new heat mat in .Hes had a bath, gone back in the viv all ok . But seen him sitting on the cool end of the viv .his colour changed to speckly black and he seemed to be abit cold when i handled him .have i done anything wrong ??