An unmanned vehicle for supplying feed to an animal, which is provided with a frame, with propulsion mechanism disposed thereon, feed supplier for supplying feed and navigator connected to the propulsion mechanism with a sensor for forming an image of an observation area, wherein the sensor comprises: a source of radiation for emitting modulated electromagnetic radiation, a receiver device for radiation reflected by an object, comprising a matrix with rows and columns of receivers, an optical device and sensor image processor configured to determine for the receivers a phase difference between the emitted electromagnetic radiation and the reflected electromagnetic radiation in order to calculate a distance from the receiver to the object. Through use of the unmanned vehicle device an excellent and reliable navigation is possible, so that, for example, milk can be conveyed efficiently from a milking implement to a calf.