Abstract: A system for determining a welfare of an animal population, the system comprising: one or more monitoring devices configured to monitor parameters of members of the animal population; a data repository comprising one or more records, each of the records (i) being associated with a respective member of the members, and (ii) including one or more parameters of the respective member as monitored by at least one of the monitoring devices over time; and a processing circuitry configured to calculate a welfare score of the animal population based on the at least two of: (a) health scores calculated for at least some of the members, (b) natural living scores calculated for at least some of the members, or (c) affectivity/happiness scores calculated for at least some of the members.