My (1 year old male) pet ball python lives in a terrarium with a metal mesh top. This past Sunday (07/08) when I was feeding him he ate happily, but on Tuesday when I was opening the lid to take him out, he lashed out and bit the mesh, something he has done before when especially hungry. Although this behavior has previously concerned me because I worry it might injure him, he has never seen particularly bothered. This time, however, he has seemed particularly uncomfortable, and keeps opening and closing his mouth like he is yawning. It is Thursday now, and as this behavior stopped yesterday, we decided to try feeding him again because of his continued apparent hunger, but when we put the mouse in, despite his hunger (he rose to meet the mouse, immediately leaving his hide) he didn't eat it. He keeps leaping for it but missing and following the mouse around the cage, but has always been skittish and is now even more so. The only mouse he ever missed  was the first I ever tried to feed him, when he was only a few weeks old, so this is clearly not usual behavior, which is why I am worried that he is injured, perhaps from biting the lid, and that the injury keeps him from eating. There seems to be very little online about how to deal with this predicament, and while what sites I have found suggest taking an injured snake to a vet, there are no local vets that deal with snakes. I am also bothered by this situation because (I believe due to his hunger) he lashes out at me whenever I try to open his cage or reach in, so it has been somewhat difficult to even access him. This is especially concerning because even when the lid is closed, when I put my hand over it, he is very interested and somewhat aggressive, so I worry that he will bite the lid again, even when I'm just trying to refill his water dish-- and of course I don't want to leave him without water. I'm more than happy to do whatever it takes to get him healthy again, so any help (asap) would be much welcomed. Thank you so much!