McNab Shepherd

The McNab Shepherd — also known as the McNab Dog, McNab Collie, or McNab Stock Dog — is an American herding breed developed in the mountains of Mendocino County, Northern California, in the late 19th century by Scottish immigrant Alexander McNab. One of the American West’s most capable and versatile ranch dogs, the McNab combines the loose-eyed herding style of the Scottish Border Collie with the heat and terrain adaptability needed for California’s diverse ranching environments. Not recognized by the AKC, the McNab is preserved and promoted by the McNab Stockdog Foundation.

Alexander McNab immigrated from Scotland to California’s Mendocino County in the 1860s, bringing Scottish herding dogs that he crossed with local working dogs on the hot, brush-covered hills of his ranch. The resulting dogs were selectively bred for heat tolerance, versatility on different livestock including cattle and sheep, and the characteristic McNab herding style — a loose-eyed, independent approach that differs from the intense, eye-to-eye grip of the Border Collie. McNab’s descendants maintained the breeding program across generations.

The McNab Shepherd remains most common in Northern and Central California, where it continues to serve as a working ranch dog on thousands of acres of cattle and sheep country. The McNab Stockdog Foundation was established to preserve the breed’s history and promote responsible breeding. Various working dog registries including the Continental Kennel Club recognize the McNab. It is not AKC-recognized.

The McNab Shepherd is a medium-sized dog standing 41 to 64 cm at the shoulder and weighing 14 to 29 kg. The build is athletic and well-proportioned — built for sustained work in varied terrain and climate conditions. The coat is short to medium-length and dense, providing practical field protection without excessive grooming requirements. Colors include black and white, red and white, and tricolor. Natural bob tails occur frequently in the breed and are considered characteristic. The overall impression is of a capable, athletic, and efficiently built working dog — every feature serving a practical ranching function.

The McNab Shepherd is intelligent, alert, and deeply dedicated to its working role and human handler. Within its family, it is affectionate and loyal; in the field, it is a focused, determined, and independent working dog that makes its own herding decisions in response to stock behavior. The breed’s herding instincts are primary and will express themselves toward children, other pets, and vehicles in the absence of proper training management. McNabs bond strongly with their owner and working partner and tend to be one-person or one-family dogs in character.

The McNab Shepherd is one of the most capable herding breeds in North America for working ranching contexts, combining the intelligence to make independent field decisions with the cooperative drive to work in close partnership with its handler. For formal herding training, the McNab excels; its loose-eyed style makes it particularly effective with cattle and other large livestock. For companion owners, consistent obedience training, herding instinct management, and structured daily activity are essential from the first day home.

MDR1 gene mutation is a documented risk in McNab Shepherd lines — DNA testing of the breeding animals and all veterinary medication decisions must account for potential MDR1 status. All treating veterinarians must be informed of the dog’s MDR1 status before any medication is prescribed.

The McNab Shepherd is generally good-natured with the children in its own family, particularly in rural farming environments where it grows up alongside them. Its herding instinct means it will attempt to round up and direct running children during play; consistent training and redirection from puppyhood manages this effectively. For active rural families with older children who participate in outdoor and agricultural activities, the McNab is a devoted and capable working family companion.

The McNab Shepherd is generally a robust and healthy breed. MDR1 gene mutation is the most significant specific health concern — present in many Collie-family herding breeds, the MDR1 mutation creates dangerous sensitivity to ivermectin (including common heartworm preventatives) and several other veterinary medications. DNA testing for MDR1 status is strongly recommended for all McNab Shepherds; all treating veterinarians must be informed of the dog’s status. OFA hip evaluation of breeding animals is advisable. A healthy McNab Shepherd typically lives 13 to 15 years.

The McNab Shepherd thrives on ranches and farms where it can perform its traditional working role. It requires extensive daily activity and a purposeful working function to remain settled and well-adjusted. MDR1 awareness is the primary ongoing health management consideration. Routine dental care, coat maintenance, and parasite prevention appropriate to a working ranch environment complete the care requirements.

The McNab’s short to medium coat requires brushing one to two times weekly, with more attention during seasonal moults. The natural bob tail, where present, requires no special care. Bathing every four to six weeks or as needed after field work. Ear cleaning weekly, nail trimming, and teeth brushing complete a simple grooming routine for this low-maintenance working breed.

The McNab Shepherd requires extensive daily exercise and purposeful working activity. On working ranches, herding and stock work provide appropriate physical and cognitive engagement. As a companion dog without a working role, 90 minutes or more of vigorous daily exercise including structured herding sports, agility, or stock dog training activities is the minimum appropriate commitment. Never off-leash in unfenced areas given herding drive and vehicle-chasing tendency.

McNab Shepherd puppies from working lines in the United States typically cost between $400 and $800 — consistent with working herding dog market pricing. The McNab Stockdog Foundation and various working dog organizations in Northern and Central California are the primary resources for finding responsibly bred McNab dogs. Working line bloodlines with documented herding performance are the most valuable investment for ranching contexts. Lancaster Puppies occasionally features McNab Shepherd listings from established US working dog breeders.

Contact the McNab Stockdog Foundation or working ranching networks in Northern California to identify responsible breeders. Request MDR1 DNA test results and OFA hip evaluations for both parents. Ask about the working herding performance and temperament of both parents — in a working dog, documented field ability is the most meaningful quality indicator. Be transparent about your ranching situation and experience with working herding dogs.