Do you have a heat lamp and a red bulb. Please put that on him so he stays warm and can move around. They don't like it to crowded. Does he have space a box a cage to move around in. Food and water. Offered to him. Please keep showing it to him. Every hr or every time you go buy him. Does he have a friend . If you had him in a incubator you can try placing him back in it for a day or two to stable.