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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.
The two largest American dog shows after Westminster are the National Dog Show (which is televised on Thanksgiving Day by NBC, usually after the Macy's Thanksgiving Day Parade) and the AKC/Eukanuba National Championship.