After success of the Pig robot, Zoran and I got invited for another robotic project by Kapelica gallery in Ljubljana. Continuing with the animal theme, we decided that the next robot should be a horse. Kapelica specializes in bio art, se this one was to have some biological component as well. We chose microbial fuel cells as such element. In the final piece, we had a life size horse moving its four legs based on movement and proximity sensors and signal from a microbial culture.