I’m really worried about my male leopard gecko Marvin as he’s acting strange. We’ve had him for 13 years, he lives with a female and has been a great pet. This last few days he’s lying out in the open at the cool end of his vivarium and not eating. I’ve never seen him not inside one the hides during the day or sit at the cool end. I’ve checked the temperature and everything is the same as always. I’m wondering if he could just be on his way out? He looks healthy but just behaving strangely and reduced appetite. Has anyone else experience this? I’ve had him at a specialist reptile vet yearly for checks since we got him, I’m thinking about setting up an emergency appointment.