I think the most annoying thing about K-9 is how they did his voice. But no, the robo dog has been done. I realize what a pain it is to have a companion in make up all the time. Take a look at Star Trek NG, Michael Dorn as Worf the klingon, went through six hours of prep time in make up. I don't believe the answer is another talking toaster or someone in a lizard suit. I just would like to see an alien companion who is unfamiliar with odd Earth customs. So when you have episodes on contemporary Earth they still maintain a sense of discovery.