In the film, when Doc Emmet and Marty are going to Marty's home in the future, the audience can see a hovering robot walking a dog. Technology has sought out to make everyday tasks easier in the film, whether it be by upgrading existing technologies or creating new pieces of technology to perform these simple tasks so we don't have to. While we currently do not have a hovering robot that could walk our dog, several technologies are being marketed as such, and several other technologies that allow you to take care of your pet already exist or are being developed.