This paper explores the co-constitutive practices associated with robotic milking technologies. Introduced commercially in 1992, they have since become especially prominent in Northern Europe and the USA. Robots are sold with the promise of improved dairy cow welfare and productivity, reduced labour costs and the liberation of farmers and farm workers from the routines of conventional milking: the machines milk cows individually, at any time of a cow's choosing, without direct human involvement or presence. In this paper, we investigate the new modes of relating that emerge through the introduction of these new technologies. Drawing on semi-structured interviews with UK dairy farmers, alongside participant observation around robotic milking...