There are about 900 breeds of sheep in the world.
A specialty show may be regional or national. A "Best in Show" win at a national specialty show is tremendously prestigious, indicating that the winning dog or bitch triumphed at a contest which attracted entries from the most serious fanciers of that breed in the country or continent. Some specialty shows attract international entries.
In the American Kennel Club, a dog needs 15 points to become a Champion, with each win gaining anywhere from zero to five points depending on the number of dogs competing and the area where the show is held.