There are several very good videos on YouTube that demonstrate the beauty of the work of a herding dog. I thought this one was one of the best.
The dogs in this demonstration area Border Collies. If you think you want to have a dog like this you have to remember some important things. The dog herds by instinct and if you don’t give him a job, he/she will try to herd something (children, cars…cats) That would appear to you to be a bad trait in that situation but it isn’t against the nature of your dog. You would need to provide this dog with a lot of activity to provide for physical and mental challenges. It would be wrong to expect this breed to be content to lie around and cuddle.
This is a good site for gaining an appreciation for the training of a dog for herding.
Watch this video for a fun demonstration of lighted sheep herding.