The Tornjak is calm and steady, devoted to its family and dignified in manner. It is good-natured with people it knows but alert and wary of strangers, and it guards its territory with determination. Bred to be hardy, it traditionally lived and slept outdoors beside its flock, even in mountain snow.
It is a large, powerful dog with a body close to square and solid bone. The long, thick coat has a dense woolly undercoat and is usually white with patches of darker colour. The long, heavily feathered tail is carried high when the dog moves and is often likened to a waving flag.
The Tornjak takes its name from tor, the local word for a pen in which sheep are kept, reflecting its long association with the flocks of the Dinaric mountains. After the late twentieth-century revival, breeders worked to fix a consistent type, and the breed was later accepted by the Fédération Cynologique Internationale, which names Bosnia and Herzegovina and Croatia jointly as its homeland. Its work was to guard sheep and other livestock against wolves, bears and thieves, often travelling with flocks between winter valleys and summer mountain pastures, and to keep watch over farmyards.