In its native country of the Netherlands it is widely used for guarding herds, being appreciated for its intelligence and working power. Along with the reduction of herds, the dog began to slowly disappear (especially during World War II) being saved from extinction by a fan of this breed. This dog is still endangered.
It is a medium-sized dog with a strong, muscular body and a large, wide head. The muzzle is short, wide and covered with long hair. It has round, hazel eyes and covered with hair. The ears are drooping. The tail is long, with dense hair and slightly curved at the tip. The fur is double layered, with a thick and soft inner layer, while the outer layer is thick, long, rough, a bit wavy and of various colours, but grayish-blue towards black is predominant.
It is a lively, very active, tireless, intelligent and brave dog. It is very loyal to its family, playful and affectionate with them, careful and suspicious of strangers. It gets along well with other dogs and other household animals and also with children.
It needs regular brushing to prevent the fur getting tangled.
It is a dog resistant to weather changes. It feels good outdoors, with a sporting type family, with experience in raising dogs. It needs a lot of daily exercise to burn its energy and to keep calm while indoors.
It needs a well-balanced, consistent training. It likes exercise, organized activity and sportive games.
It can be used as a watchdog for flocks and houses and as a companion.