Thanks for the reply. This makes me feel a bit more comfortable. It's never in a tight S shape really, more just like a curve so his head isn't awkwardly sticking straight out. The rat fuzzy I gave him was actually quite large, but considering he hasn't eaten in 3 weeks or more might mean he'll be more hungry. He doesn't seem super defensive, and when he is, he just hides if he feels threatened (i.e. by water if I'm bumping the humidity), then he comes right back out like nothing happened 30 seconds later. Considering he ate, I guess I have nothing to worry about, as that's a sign of a stress free snek.