Hello! So I have a male Ball Python (Edwin), and he eats every Wednesday night. I have him on one weanling a week and he has done fine until tonight. I'm kind of freaking. I offered him the rat, he had a beautiful curl when he took it. Gave him some space, checked in, and he had it almost down all the way. Gave him more space, come back and it looks like the rat is back in his enclosure with him, and he is trying to eat it again. I was so confused. I'm still confused as to what may have caused this. My poor little guy looked so unhappy, his jaw seemed offset, and his pupils were dilated. I removed the rat from the enclosure because it was now covered in the substrate. The only thing that has changed for him as of recently is his substrate. He was previously on paper towel. I switched him maybe three days ago to a mix of eco earth and forest floor. He did great on it, and spot cleaning was a breeze. I'm not sure if the substrate through him off, but I'm really quite concerned now. His temps in his bin are always perfect (cold side= 77-78, hot side 87-88,89), although with his new substrate his humidity has been around 60%, and I have been trying to monitor that since it's on the higher end of things. Right now he is out of his hides and chilling flicking his tongue, he seems active (almost actively searching for more food or something since he's more of a hider), and his jaw looks normal again. I just want to know what I did wrong to cause this since I try to keep everything super perfect for him. I want to prevent this from happening again. Also, is there anything I can do for him now to make things more comfortable for him?

Thanks!
Maddie & Edwin