Where you’ve heard of it: The 1950s TV show Lassie
Collies are naturally loyal and affectionate, especially with children. There are actually two types of collies: smooth (short hair) or rough (long hair). The rough collie (like Lassie, and at left) has a heavy coat that requires daily brushing. Collies are herding dogs, and need to act on their natural instincts through frequent walks, training or agility courses. This helps challenge them mentally and lets them practice their innate abilities, preventing bad behavior such as nipping at heels.