"There is no good flock without a good shepherd, and there is no good shepherd without a good dog."
                                                — The International Sheep Dog Society

United States Border Collie Handlers Association - USBCHA http://www.bordercollie.org/usbcha.html

Australian Shepherd Club of America, Inc - ASCA 
http://www.asca.org/Programs/Stockdog/index.htm

American Herding Breed Association - AHBA
http://www.primenet.com/~joell/ahba/ahba.htm

The Drummond Ranch
http://www.herdingusa.com/