The Polish Lowland Sheepdog, also known as the Polish Sheepdog, the Valee Sheepdog, the Lowlands Herder, the Berger Polonais de Vallee, the Polski Owczarek, the Polski Owczarek Nizinny, the Owczarek Nizinny , the Owczarek Polski Nizinny, or simply the PON or the Nizzy, is of unknown origin. It is thought to be related to the Puli and other Eastern European mountain herding breeds. In fact, it is believed to be the link between the corded and long-coated herding dogs from Eastern Europe. It bears a striking resemblance to the Bearded Collie, and they probably share a common ancestry.
Mature males should stand 18 to 20 inches at the withers; females should stand 17 to 19 inches at the withers. The adults of this breed typically weigh between 35 and 50 pounds. This is a double-coated breed, whose entire body is covered with a shaggy and fairly straight coat. A breed characteristic is bushy eyebrows that cover the eyes. All coat colors are acceptable, the most common being white with either black, gray or sandy patches