Answer by
DogLady4 (28)
AKC's breed website and Sheltie Talk (book) have good explanations with nice diagrams. Basically, tape/glue 8-20 week puppy ears into PRECISELY the conformation they should assume; this means using gentle support on the underside since the ear shouldn't "kink" but roll gently forward naturally. Not every puppy's ears will cooperate, no matter your efforts; some Shelties just have prick-ears.