The Collie grew out of Scottish sheep-herding dogs and was refined in Victorian Britain into the elegant dog most Americans picture from Lassie. There are two varieties of one breed: the Rough Collie, with a flowing mane and long coat, and the Smooth Collie, with a short, sleek one. Both have a dense double coat, a long wedge-shaped head and expressive eyes, and adults usually weigh 50 to 75 pounds.
Many Collies are gentle, sensitive and closely tuned to their families, and they have a long reputation for patience with children. Herding instincts can show up as barking, circling or nudging at moving kids. In a city like Allentown, that means steady training, a reliable leash habit and a plan for heavy seasonal shedding. Collies vary, so spend time with the dog before deciding.