It is a beautiful picture watching your sheltie performing the task they were bred to do.
This is a link to trainer Lynn Leach, from Hope BC.
If you would like additional information on herding, or how to get started, contact: 

Kathy Walshon  or   Laura Johnson
Walshona's End of Century, AM CD & PT, Can CD & HT
Please put "herding" in the RE: spot on your e-mail.
The purpose of herding is to preserve & develop the herding skills inherent in the herding breeds.  It demonstrates that they are able to perform the useful functions for which they were originally bred.
Jahdo's Casual Affair, PT, OAJ, NA