The primary trialing programs are offered by the following organizations:
- American Kennel Club (AKC) http://www.akc.org/
- Canadian Kennel Club (CKC) http://ckc.ca/en/
- American Herding Breed Assoc. (AHBA) http://ahba-herding.org/
- Australian Shepherd Club of America (ASCA) http://asca.org/
- U.S. Border Collie Handlers Assoc. (USBCHA) http://www.usbcha.com/
The Pacific Northwest Herding Club hosts primarily AKC tests and trials although may occasionally offer AHBA events. The Pacific Northwest Herding Club was founded to showcase boundary or tending style herding. Tending is a style of herding originating in Europe where the dog works as a "moving fence" to guide a flock of 20 or more sheep down roads, past cars and over bridges to an open field or "graze" where the dog contains the sheep while they eat. In the AKC program, the C course is designed to test the skills needed for a boundary/tending dog.