Hebridean

Sheep

The Hebridean is a breed of small black sheep from Scotland, similar to other members of the Northern European short-tailed sheep group, having a short, triangular tail. They often have two pairs of horns. Modern Hebrideans have black, rather coarse wool, which fades to brown in the sun and often becomes grey with age; there is no wool on the face or legs. If not shorn the wool may moult naturally in spring. Rams and ewes typically have one pair of horns, but often have two or even more pairs (polycerate), and occasionally none. They are considerably smaller than most other breeds of sheep.

http://en.wikipedia.org/wiki/Hebridean_(sheep)