The Estrela Mountain Dog was bred in medieval Hungary for guarding livestock. It has a dense double coat for protection from cold in the Estrela mountains but can also tolerate heat well. The coat requires regular maintenance. The Estrela is calm but naturally dominant & requires a strong handler; it is suspicious of strangers. Some animals are prone to hip dysplasia. The Estrela is not suited to urban living.
The Pyrenean Shepherd is known in France as the Berger des Pyrénées. It is a medium small breed of dog native to the Pyrenees mountains in southern France and northern Spain. It has been bred since at least medieval times for herding livestock, especially sheep. The Berger worked as an active herder together with the Great Pyrenees, another mountain dog which acted as the flock's guardian.
The Slovensky Kuvac was bred in medieval Slovakia for guarding livestock. It remains a fearless & powerful defender of its territory and of people it considers part of its pack. With its own family, it can be dramatically affectionate. The Slovensky was almost extinct following World War II but was brought back to life by Doctor Antonin Hruza. The breed is not recommended around children, nor strangers, nor other dogs, nor in urban spaces. It handles cold well but sheds proficiently.