Computerized and electronic systems for cattle estrus detection and monitoring, namely, dairy herd computerized management systems used to gather and analyze data on cattle, all comprised of a personal computer, computer software and a control unit, for estrus detection, health monitoring, rumination monitoring and for processing and analyzing the collected data; computerized and electronic systems for cattle estrus detection and monitoring, namely, computerized systems comprised of computers and computer software all for controlling, handling and managing dairy herds including for health control, breeding control, selection gates, feed control; computerized and electronic systems for cattle estrus detection and monitoring, namely, electronic devices for cattle identification and monitoring and parts and accessories therefore, namely, sensors, transponders and data receivers, data terminal with display, antennas and optical readers; humanoid robots with artificial intelligence; data processing and analysis apparatus, including computerized and electronic systems for monitoring animals and image and video processing equipment and systems; computerized animal face recognition device; computerized tracking systems, attendance recorders, monitoring and recording devices and apparatus and animal tracking devices