Sony's Aibo dog came and went pretty quickly, but that's not to say there's aren't a few robotic animals out there picking up the slack. We're particularly partial to Roboraptor, which was created by a former NASA robotics physicist. The robot walks and runs with "predatory gaits," and, like you would expect of any pet, it responds to its environment in three moods: playful, cautious, and "hunter."
