Halo and Pepper haven't noticed the printer head moving back and forth yet (Cammie could care less about the printer). But, what they do find fascinating is when it grabs a piece of paper. They bat at the tray and paw at the paper and then quickly back-up when the printed page is ejected right at their heads! I'm going to try to get a movie of it one of these days when I figure out the new digital camera.