Collies come in different types, each with unique traits and appearances, such as the Border Collie and Rough Collie. When talking about a collie, you should specify if it's a Border Collie or a Rough Collie.
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Working Heritage
Collies are herding dogs by origin, which explains their high intelligence and ability to follow complex commands. The collie herded the sheep with almost no guidance from its owner.
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Lassie Fame
Collies are often associated with the famous TV dog Lassie, which has influenced their image as loyal family pets. Just like Lassie, the collie showed remarkable loyalty to its family.