When he gets real skinny where you can see his thigh bones, then you have to force feed him with a pinky injected with liquid calcium/vitamins. They are made from flukers at petco for 7.99 each. The syringe ,you can get at drug store or some one with diabetes. That should be after 7 days not eating. Keep an eye on him. You have to get reed of the light. Put him in a small grow out container.