Augie can't move upper body

[Mommy2many]

I'm referring to the "s" shaped curves as "kinks" he did not have that prior to this episode. Especially in the third photo below his neck.

[guidofatherof5]

I see what you mean now. Not sure what that would be.

[Thamnophis]

I think these are caused by its last throes/last convulsions while it was dying. The fact that it hardly could move before it died was also a sign of the dying process. Seen this lots of times in the shelter where I have worked. The cause of death can only be determend by a qualified vet.