Ok I have a ball python that hatched June 9, 2008. He is approximately two feet in length and a good eater, shedder, etc. He gets out everyday for some slither time and some love. Well last night he was stretched out on my stomach with his face in my neck. I was rubbing his back lightly like i always do and he started almost like shuddering or shivering. Then he arched his back almost as if he was stretching with a shiver. Has this happened to anyone else and should I be concerned. I put him on the floor to observe his movements and he seemed fine and then when put back in tank he just climbed in his water bowl for a swim. He just ate on Monday two adult mice and is getting close shedding time. Thanks in advance for the advice! Morgan