Marty McFly saw one of these in Hilldale the night he and Doc Brown attempted to rescue Jennifer Parker from his future residence, and wandered away to do some exploring of Hilldale. The distraction was sufficient for Biff Tannen to steal the DeLorean time machine and travel from 2015 back to 1955.
- Devices that could make this concept a reality do in fact exist, but for the time being are not widely available. Additionally, the noise from modern drones (used for this purpose) would likely spook most dogs, making their use unlikely. http://news.discovery.com/tech/robotics/drone-takes-dog-for-walkies-140522.htm For the time being, it appears that owners will still have to walk their dogs manually. But maybe one day...!