Unmanned self-propelled device (1) for carrying out activities in a stable, in particular a stable with a floor (30) which, in its upper surface, is provided with a pattern of optionally vertically throughgoing interruptions (31), wherein the device comprises a frame (7) with a longitudinal direction which coincides with a main direction of travel of the device, wherein the device comprises a first and a second supporting member (11 a,b) for the frame (7), which, in relation to the dimensions of the device (1), are disposed in the vicinity of each other and are connected to the frame (7) and form a first and a second supporting surface, wherein the first and the second supporting surface are both formed to provide, when viewed in a first vertical plane containing the main direction of travel of the device (1), a first and a second contact location with the floor (30), wherein, when the two supporting members (11 a,b) are directed for moving the device (1) in the main direction of travel, the first and second contact locations provide first and second contact location centre lines, respectively, which are transverse to the first vertical plane and which do not coincide with each other.
