There are about 900 breeds of sheep in the world.
The sit for exam is a modified version of the Stand for Exam. It is generally used in novice level classes and requires the handler to order the dog to sit and then to move away from the dog the length of the leash. The judge will then approach the dog and pet the dog's head.
Additional points may be awarded to the Best of Winners, or a class dog that goes Best of Breed or Best of Opposite Sex, again depending on the number of dogs competing