Wow, Joe, thanks! That's exactly what my snake looks like (the sunken in part, not the morph). I am printing that out right now and taking it to my vet. I would have never guessed that in a million years! Spot is rather active at night and does climb his cage. He's just about mastered spanning the lenght. He'd due for an upgrade next pay day.

We'll see what the vet has to say.