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McNab
Herding breed from California, United States
Breed overview
Reviewed · Database recordAbout the McNab
The McNab is a medium-sized herding dog breed originating from California, United States. It is known for being intelligent, energetic, loyal, alert, and work-focused. The breed's size is estimated: males and females typically weigh between 16 and 29 kilograms and stand 46 to 64 centimeters tall. Lifespan data is not available. The McNab is not universally recognized; its recognition status varies by registry. As a herding breed, it was developed for ranch work, but specific working purposes beyond that are not documented. Individual temperaments may vary.
Quick facts
McNab at a glance
Sizemedium
Breed groupHerding
OriginCalifornia, United States
LifespanPending
Male weight16–29 kilogram
Female weight16–29 kilogram
Male height46–64 centimetre
Female height46–64 centimetre
Origin and history
Where the breed comes from
The McNab breed was developed in the late 1800s by Scottish immigrant Alexander McNab on his Mendocino County ranch in California. He crossed Scottish Collies and local working collies with other herding dogs to create a versatile ranch dog suited to the California terrain. The breed's history is tied to this specific origin, but exact dates and details of the crosses are not fully recorded. The McNab was bred for its working ability, particularly herding, and is described as an agile, athletic dog with stamina and intelligence. It remains a relatively rare breed, and its recognition status varies by registry, meaning it is not universally acknowledged by all kennel clubs. The breed's development was driven by practical needs on California ranches, but no further historical events or milestones are documented in the available facts.
Physical characteristics
Structured dataSize, build and coat
Female
16–29 kilogramAdult weight46–64 centimetreAdult heightCoat typesPendingCoat colorsPendingRecognitionvaries by registryData methodai assisted draft
Temperament
Typical breed tendencies
Intelligentenergeticloyalalertwork-focused
Breed tendencies are general guidance. Individual behavior depends on genetics, socialization, training, health and environment.
Exercise, training and maintenance
1–5 methodologyDaily care profile
Higher daily exercise demand
Typically responsive to training
Moderate compared with other breeds
Moderate compared with other breeds
Family suitability
Home and household fit
Supervise every dog–child interaction.
Introductions and socialization still matter.
Exercise, enrichment and noise tolerance affect fit.
Climate suitability
Modelled tendency · low confidence
Modelled tendency · low confidence
Modelled tendency · low confidence
A general morphology-based tendency. Individual dogs still require shade, shelter, water, acclimation and weather-appropriate activity. Method: climate-morphology-v1.
Health overview
Veterinary sources requiredHealth considerations
No McNab-specific screening programme or peer-reviewed disorder-prevalence study is currently attached to this profile. This is not evidence that the breed has no health risks. Owners should use routine preventive veterinary care and discuss screening appropriate to the individual dog's history, examination and family line.
Veterinary disclaimer: This profile is educational and does not replace examination, diagnosis or treatment by a veterinarian.
Feeding overview
Nutrition and feeding
Research in progress
Reviewed feeding guidance will appear after an approved source is imported and editorially reviewed.
Decision support
Potential advantages and challenges
Potential advantages
- Typically responsive to consistent training.Supported by trainabilityScore: 4
- Commonly described as loyal.Supported by temperaments.loyal: true
Potential challenges
- Higher daily exercise and enrichment needs may not suit every household.Supported by energyScore: 5
Similar breeds
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Growth chart
McNab puppy growth
Modeled estimates
Open interactive chart From puppy weight to adult size
Compare male and female growth, check weight by age and estimate mature size.
Adult male weight16–29 kilogramAdult female weight16–29 kilogramGrowth modeladult-range-size-model-v1
Preview only. Open the complete chart to adjust age, current weight and measurement units.
Frequently asked questions
Common questions
What is the size and lifespan of a McNab?
The McNab is a medium-sized breed. Estimated adult weight ranges from 16 to 29 kilograms for both males and females, and estimated adult height ranges from 46 to 64 centimeters. Lifespan information is not available in the supplied facts.
What is the temperament of a McNab?
The McNab is described as intelligent, energetic, loyal, alert, and work-focused. However, individual dogs may vary, and these traits are general tendencies rather than guarantees for every dog.
How much exercise does a McNab need?
The McNab has an energy score of 5 out of 5, indicating a very high energy level. It likely requires substantial daily exercise, but specific exercise needs are not detailed in the facts.
What are the grooming requirements for a McNab?
The McNab has a grooming score of 3 out of 5, suggesting moderate grooming needs. Shedding is also rated 3 out of 5, meaning moderate shedding. Coat types and colors are not specified in the facts.
Is a McNab suitable for families with children or other dogs?
Child suitability is rated 3 out of 5, and dog compatibility is also 3 out of 5, indicating average suitability. However, individual temperament and training play a significant role, so supervision and proper introductions are recommended.
Can a McNab live in an apartment?
Apartment suitability is rated 3 out of 5, suggesting it may be possible but not ideal. Given its high energy level, a home with a yard or access to ample exercise is likely more appropriate.
Where does the McNab originate from?
The McNab originates from California, United States. It was developed in the late 1800s by Alexander McNab on his Mendocino County ranch, crossing Scottish Collies and local working collies with other herding dogs.
Data transparency
✓ Published · VerifiedSources and review status
APIThe Dog API ↗The Dog API Terms of Service (effective 2023-07-01)
VETERINARY SOURCEWSAVA Global Nutrition Guidelines and Toolkit ↗Copyright; factual citation and original summary only
Image source: The Dog API. Last reviewed 7/20/2026.