2 of mine never ball up but other than that they almost follow the ball python text book. My large male wrote his own book. Probably the biggest thing with Renfield, my large male is his infatuation with my reading glasses. When he is on my lap, he just cruises around. When I put my reading glasses on it is straight up to my glasses to check them out. And to make it more weird he checks out the left lens of my glasses 90% of the time. I had to quit trying to watch him. He dang near drove me cross eyed.: