My brother has a 5 month old ball python that was always friendly and active. Now it curls up under its water dish and when you try to pull him out from inside the bottom of it, he tenses up so you can't. He's been there for a week. Temps and humidity are ok. I am going to try to get him out and replace the water dish with one that has a flat underside. But do you think that something is wrong with him?