The Scottish Blackface breed has been developed to utilize rough or coarse grazing ground and to produce grass fed market lambs of the highest quality. When stocking new ground, the Scottish Blackface ewe has the added advantage of the homing or hefting instinct. In practice, many farms in Scotland are sold with the sheep included in the transaction. On better quality grass grazing, premium lambs are easily reared with an unrivalled sweet flavor and tenderness.
The Scottish Blackface breed is very self sufficient but does need assistance to winter over in those areas where snow falls are heavy and little or no ground is blown bare. Supplementary hay feeding may be needed. They recover very quickly following bad winters since they have great courage which keeps them foraging for the best spring growth available.
Almost nothing can tame their independent spirit which is what makes them the Premier Hill Breed.
Of equal importance, the Scottish Blackface is at the pinnacle of the 3 Tier Stratified Breeding System where ewes are kept on coarse grounds for around 4 years and the older ewes are drafted to better pastures to be put to the Bluefaced Leicester or North Country Cheviot or Border Leicester Rams to produce Scotch or Cheviot Mules or the English Half-bred / Greyface maternal ewes.
The ewe lambs from these crosses are both docile and prolific and are ideal for further crossing with heavy meat breed Terminal Sires to produce fast growing grass fed quality prime lamb. The Scottish Blackface ewe has a long life and typically will give four or five lamb crops on the hill or marginal ground and a further two or three crops on the lower ground.
This information is from the sbbu.org website.