Abstract: A method comprising: receiving an image of a scene comprising one or more animals; defining region boundaries for each of said one or more animals; evaluating a suitability of each of said region boundaries for further processing, based, at least in part, on a predetermined set of parameters; and determining at least one of: (i) a physical state of at least some of said one or more animals, based, at least in part, on said further processing, and (ii) an identity of at least some of said one or more animals.