I was just wondering what the differences are in these two breeds? They look so much alike yet their personalities seem so different. I've always been interested in owning a Sheltie until I worked at a vet, then I realized that they were a little bit too much for me (great dogs, but not for me ). However, every Collie I've met I've just "clicked" with and I'd love to own one some day.

Are they related breeds?