The Smooth Collie is the short-coated variety of the Collie, a Scottish sheepdog that became fashionable after Queen Victoria took an interest around 1860. In the US it's judged by the same standard as the Rough Collie, and it comes in sable, tricolor, blue merle or white. Smooths are less common than Roughs, so many people have never met one.
Under the sleek coat is the same sensitive, devoted, quick-learning dog. Smooths respond best to calm, reward-based training, and many nip at running kids or bark at every knock. In Allentown's close-set rowhouse blocks, early quiet training helps with neighbors. The dense double coat sheds moderately and heavily with the seasons, but it never needs a haircut.