I don't have any prolem with larger copperheads usually, the babies are the ones you spend 45 min trying to move. Pygmies do strech out and flop off but at least it isn't because they are flailing all over the place. using a second small hook solves this (I use one of the telescoping pocket hooks). By the way, The three cages I dread are a horridus that starts snapping in my direction as soon as I walk into the snake room, an over active 5' kaouthia that refuses to stay on a hook (flails around so bad i've finally resorted to a shift box), and a gaboon that I can barely get out of the cage (im looking into some of the real wide flat hooks right now) because it is so fat and heavy