Does the heating pad have a thermostat to regulate the temperature? Do you have any thermometers/hygrometers in the cage? What are the cage temperatures, room temperature, and cage humidity.

Check these threads out to make sure everything is in the normal ranges:

http://ball-pythons.net/forums/showt...ius)-Caresheet

http://ball-pythons.net/forums/showt...t-Thermometers