In a headlock system having a plurality of n headlock cells, each of the n cells being adapted to enclose at least one animal; n is an integer greater than 1; a system for locating the position of at least one animal, the system comprising: at least one identification means adapted to transmit at least one identification signal associated with said at least one animal; at least one locating means adapted to generate at least one location signal associated with said at least one animal; and, a data processing system in communication with said at least one identification means and said at least one locating means, adapted to analyze said signals, said analyzed signals comprising the position within a predetermined region in said headlock system of each of said at least one animals as a function of time.