Medical machines and machine tools, namely, sensor tag for sensing heat, movement, steps, activity level, estrus condition, rest time, rest bout, calving, prolonged calving, for medical use; a leg tag sensor for animals for medical use for detecting animal heat, behavior, health, wellness, namely, animal movements, steps, rest and rest bout for the purpose of detecting estrus condition, low activity, calving and prolonged calving, and group stress; a leg tag sensor that provides calving birth...