Because Border Collies and most of the herding group of dogs are highly intelligent, high energy dogs they need owners who understand and work with their special needs.
These working dogs need J-O-B-S. Due to their high intelligence, they will become bored with the mundane and are not the couch potato types!
Before getting this breed people need to really look into what their energy level is. I Highly recommend a book called The Perfect Match by Walkowicz. Great help in choosing the right companion.