I have a mid-adult, male pacman frog. Recently it has been very active, a big change from it's normal only emerge to be fed routine. For the past few nights or so he has been waking me up several times during the night by hopping around loudly in his tank. I woke up this morning to find him laying sprawled on his back kicking to try to right himself. After I righted him, he has spent the last 4 hours hopping into the glass walls of his tank repeatedly as if he were trying to escape. He has also been very difficult to persuade to eat for the last 3 weeks. It takes about 5 minutes of moving his food closer to him and trying to hand him his food before he will eat anything. Sometimes he must even be force fed. He has always been a picky eater, but he used to accept the food within 30 seconds of me giving it to him. His tank conditions are optimal temperature and humidity. He has ample space and a comfortable place to hide, along with enough substrate to allow for burrowing. If anyone could give me some insight about possible causes of the strange behavior of my frog, I would greatly appreciate it.
The picture is him, in between trying to escape, the marks in the condensation are from him.