I recently took in an adult male RTB. He was free, and I was helping a friend by taking it so I made room. Upon looking at the snake it seemed fine. Unfortunately I am new to red tails (especially adults) and didn't notice any problems upon the first examination. But, after a couple days of settling in I took him out again to see how he was. And I noticed his mouth was gaping to the side a bit. I didn't hear any clicking, and haven't really heard or seen many obvious RI symptoms. He eats good too, only missed a couple meals here and there. The main things I notice are the mouth gaping all the time, and maybe a little excess saliva but that could be because his mouth is open and I can see it. I took some pictures of him.