Abstract: This disclosure relates to a system for livestock monitoring. Animal monitoring devices, mounted on animals, collect accelerometer data of parts of the animals. The devices classify the accelerometer data into one of multiple animal behaviours, to create behaviour classification data. Gateway devices receive the behaviour classification data from the animal monitoring devices, responsive to the one or more of the multiple animal monitoring devices being within a communication range of the gateway device. The gateway devices also obtain sensor data in relation to the animals that is measured independent from the animal behaviours. A rules engine, located remotely from the animals, determines compliance of the animal behaviours with predetermined rules, wherein the behaviours and sensor data are used as variable values in determining the compliance.