I saw a video from a dairy farmer once explaining how his automated milking machines worked. The cows bring themselves to the machines, and as an inducement they get the tastiest feed while they’re milked. The cows wear RFID collars so the machines know which cow is which. This serves for a lot of purposes (like identifying when a cow has a teat that isn’t producing so they don’t try to milk that one) but the one that made me laugh was blocking some cows that keep trying to come back because they want the good feed. The system’s like, “no, you were here five minutes ago, you don’t need to be milked again!”