Were all 14 kept in the same conditions/location? I have no idea what could have been going on just yet so I'm trying to get an idea of what was happening here... if say 8 of them that were acting odd were kept in a rack in one room and the other 6 in another room in quarantine or whatever the case that would definitely be a place to start. 8 out of 14 snakes acting odd in the same way would really concern me! I had one of my snakes acting very off one day and I was a nervous wreck but he was back to normal in the morning when I woke up so I wrote it off as nothing. He was very hyperactive just slithering around super fast like I've never seen, he was tensley curved from head to tail, like a series of tight s's all the way down and he would rocket out of his cage and wherever else i let him go. I handled him and he raced up my arm around my shoulders and then around my neck, it seemed like he was traveling focusing on his head....not using him body as much as he normally would to move but more like he'd move his head/neck and his body just trailed. when he wrapped around my neck it was like he was just pulling with his head, he made a tight wrap around my neck and with every pulse of movement he'd nudge his head hard into my neck like he was dragging himself around with his head. It was the strangest thing I've ever seen but he never did it again