Hi everyone. I have some questions concerning my 4 and a half year old Veiled Cham. His name is Billie , and has been quite normal Behavior wise , but two days ago when I turned his light on he was way lower on branches than normal. I watered like normal and tried to feed however he would not take any food. I showered and went to the store probably a two hour process and when I came back he was face down on the ground. On his side , and his back legs and tail on bottom branch still. His front legs and head and top half of body was laying on side on the bottom of cage. Black in color , and eyes closed. I was horrified. Touch him and his eyes opened like as if he could barely open them. I tried picking him up gently he hissed so I left him alone. I watered and he tried moving but it looked like as if he wasn’t strong enough . I thought he was dying he is older so I wasn’t sure. I had left and came back a hour later and Billie was up on a middle branch green as ever. He has not taken food today however but , he is on a branch, he is laying his head on branch but hanging there. Kind of being weird and sometimes he’s upside down and sometimes he normal just laying completely on branch head and alll.. please help . I don’t know what’s wrong with him ..