Right at the tail end of the summer season, I noticed my 10 year old male Leopard not moving around much. Throughout the summer he does his typical Leopard behavior by spending most of the day grazing. 3-4 days went by and no movement. I took him in and had his blood and fecal tested. Totally normal and healthy. I kept him inside for a few days in a small heated enclosure. He ate very well. I figured he was fine so I took him back out to his outdoor area. He goes to find a place to hide and doesn't move for days. I think he'd sit there for weeks if I let him. The only time he'll eat is if a place food right in front of him. I've tried several different pen options, giving him control of the whole yard. I've placed him by himself and with my other Leopard. There's no change. Has any experienced any similar types of behaviors? If so, what did you do about it?