Let me first say that Kellogg isn't new or anything - we've had him for about 2 years. He's always loved being held, picked up, and being out of his enclosure until a few months ago. His feeding habits haven't changed, only his behavior. We recently got a new ball python (a few months ago - august 2015), and thus both had a new enclosure, and ever since then he's been acting terrified of me. Whenever I get to close to the cage and he's out exploring, he'll jump back and act all stiff as if he would bite (though he's never, ever bitten me). If I try to pick him up, even the slightest touch makes him flinch his entire body and/or run away as fast as he can and hide. I recently even bought a snake hook to try to pick him up, and he still acted the same. He never acted like this before. He used to love being picked up and would wait around 11 to be taken out. The sweetest snake ever. I'm just concerned now that handling more to get him used to me, will make him more stressed. I'm certain it has something to do with the different, front-opening, higher enclosure + the other snake below him, though it's been more than a few months now and I would think he would be used to it by now. And there's nowhere else I can move him so that he isn't near Moses (the other snake). Moses seems to love being handled and doesn't even seem to acknowledge that Kellogg is even there. I just don't know what to do at this point, and it makes me incredibly sad and frustrated. Pic of enclosure, if it helps. Kellogg is on the top.