Cargill Inc. has made a minority investment in an Ireland-based tech company whose software can recognize individual cows and other livestock. The size of the investment in Cainthus not disclosed. Cainthus, based in Dublin, employs facial-recognition technology to help identify individual animals based on hide patterns (even all-black ones, because there's still variations in their coats that humans might not discern). The company's software also food and water intake, heat detection and behavior…