Bernese St. Bernard Mix: The Giant Gentle Breed Guide

What Two Breeds Make Up the Bernese St. Bernard Mix?

The Bernese St. Bernard mix—sometimes called the Saint Bernese—is a designer cross between two of the most iconic giant working breeds in the canine world: the Bernese Mountain Dog and the St. Bernard. Both parents hail from the Swiss Alps, where they were originally bred for draft work, farm guarding, and alpine rescue. The result is a massive, affectionate companion that inherits the calm demeanor and people-oriented nature of both parent breeds.

This is not an AKC-recognized breed. It falls under the designer or mixed-breed category, meaning individual dogs can vary significantly in appearance, size, and temperament. Most Bernese St. Bernard mixes are first-generation (F1) crosses, though some multigenerational breeding programs have emerged in recent years.

Understanding Generations: F1, F1B, and Multigen Bernese St. Bernard Mixes

Because this is a designer cross and not a standardized breed, the generation of your dog matters when predicting traits. Here is how the generation terminology applies:

Most Bernese St. Bernard puppies you will encounter are F1 crosses. If a breeder advertises F1B or F2 litters, ask for documentation of both parents and understand that variability actually increases in later generations, not decreases, unless rigorous selective breeding is practiced over many generations.

Size, Weight, and Growth: How Big Will a Bernese St. Bernard Mix Get?

This is one of the largest designer crosses available. Both parent breeds are giants, so the mix reliably falls into the giant-breed category—but the exact size depends on which parent the puppy favors.

Giant breeds grow slowly. Your Bernese St. Bernard mix puppy will likely reach about 70% of its adult weight by 12 months but may continue filling out and adding muscle mass until age 2.5 to 3 years. Feeding a large-breed puppy formula (with controlled calcium and phosphorus ratios per FDA pet food guidelines) is critical during the first 18 months to reduce the risk of developmental orthopedic diseases like hip dysplasia.

Expect males to fall on the upper end of these ranges and females on the lower end, though this is not guaranteed in mixed breeds.

Coat Types, Colors, and Shedding: Is This Mix Hypoallergenic?

No. The Bernese St. Bernard mix is not hypoallergenic. This is a heavy-shedding dog regardless of which coat type it inherits. Potential owners with allergies should look elsewhere.

Coat inheritance in this cross typically falls into one of three patterns:

• Bernese-type coat (long, tricolor): A dense double coat with a long, slightly wavy outer layer. Classic black, white, and rust tricolor pattern. This is the most common coat seen in F1 litters. Heavy year-round shedding with intense seasonal blows in spring and fall.
• St. Bernard-type coat (short, smooth): A shorter, denser double coat, typically white with red, brown, or mahogany markings. Moderate to heavy shedding, though slightly easier to manage than the long coat variety.
• Intermediate coat: A medium-length coat that does not fully match either parent. May have feathering on the legs and tail with a mix of tricolor and red/white patterning. Shedding is comparable to the long coat type.

Both parent breeds possess a thick double coat adapted for cold alpine climates. This means your dog will be heat-sensitive and poorly suited for hot, humid environments. In temperatures above 80°F (27°C), exercise should be limited to early morning and evening, with access to shade, air conditioning, and fresh water at all times.

Temperament: What to Expect from a Bernese St. Bernard Mix

Both parent breeds are known for gentle, people-oriented temperaments, which is the primary reason this cross appeals to families. However, "gentle" does not mean "easy." Giant dogs with working-dog instincts present specific behavioral considerations.

Best-Case Temperament Scenario

A well-socialized Bernese St. Bernard mix inherits the Bernese's devoted loyalty and the St. Bernard's patient, clownish friendliness. The result is a dog that is deeply bonded to its family, tolerant of children, welcoming to visitors, and generally calm indoors. These dogs often excel as therapy animals due to their steady demeanor and imposing-but-soft presence.

Challenging Temperament Scenarios

• Stubbornness during training: Both breeds are intelligent but independent thinkers. The St. Bernard in particular was bred to work autonomously in alpine conditions, which translates to a dog that may question commands rather than obey instantly. Patience and positive reinforcement are essential—aversive methods like shock collars or prong collars will damage trust and are never appropriate.
• Guarding instincts: The Bernese Mountain Dog was a farm guardian. Some individuals inherit a wariness of strangers and may bark or position themselves between their owner and unfamiliar people. Early socialization (exposure to diverse people, environments, and sounds before 16 weeks of age) is critical to prevent over-protectiveness.
• Separation distress: Both breeds are deeply people-oriented and prone to separation anxiety if left alone for long periods. This is not a dog that thrives with owners who work 10-hour days away from home without a dog walker or daycare arrangement.
• Adolescent clumsiness: Between 6 and 18 months, giant-breed puppies are notoriously uncoordinated. Expect bumping into furniture, stepping on feet, and enthusiastic tail-whipping that can knock objects off tables. This phase passes but requires patience and puppy-proofed living spaces.

Health Considerations: Hybrid Vigor vs. Inherited Risk

One of the most persistent myths in the designer dog world is that crossbreeding automatically eliminates health problems through "hybrid vigor." Here is the reality: hybrid vigor (heterosis) can reduce the risk of recessive genetic disorders that are concentrated within a single breed's gene pool. However, it does not protect against conditions that both parent breeds share. Unfortunately, the Bernese Mountain Dog and St. Bernard share several significant health vulnerabilities.

Shared Health Risks Between Both Parent Breeds

Breed-Specific Conditions to Watch For

From the Bernese Mountain Dog side, be aware of malignant histiocytosis, a rare but aggressive cancer that is disproportionately prevalent in the breed. The AKC notes that Bernese have one of the highest cancer rates of any breed, with some studies estimating that nearly 50% of Bernese die from cancer-related causes.

From the St. Bernard side, watch for entropion and ectropion (eyelid abnormalities), epilepsy, and hypothyroidism. Droopy-eyed individuals may need surgical eyelid correction.

Lifespan Expectations

The realistic lifespan for a Bernese St. Bernard mix is 7–10 years. This reflects the shortened lifespans typical of giant breeds. The Bernese Mountain Dog averages 7–10 years, while the St. Bernard averages 8–10 years. Crossbreeding has not been shown to meaningfully extend lifespan when both parent breeds share similar longevity constraints.

Exercise, Training, and Daily Care Requirements

Despite their massive size, Bernese St. Bernard mixes are relatively moderate in their exercise needs. They are not endurance athletes—think "leisurely hiker" rather than "marathon runner."

Daily Exercise Guidelines

• Adults: 45–60 minutes of moderate exercise daily, split into two walks. Include gentle hill walking or swimming (excellent low-impact exercise for joint health).
• Puppies (under 18 months): Follow the 5-minutes-per-month-of-age rule per walk, twice daily. An 8-month-old puppy gets approximately 40 minutes per walk. Over-exercising growing giant breeds increases joint damage risk.
• Senior dogs (7+ years): Reduce to 30–40 minutes of gentle walking; adjust based on arthritis development.

Training Approach

Use positive reinforcement exclusively—food rewards, praise, and play. Both parent breeds are sensitive to harsh correction and will shut down under aversive pressure. Key training priorities include:

1. Loose-leash walking (start by 12 weeks): A 150-lb dog that pulls on leash is dangerous and unmanageable. Use a front-clip harness (brands like the Ruffwear Front Range or 2 Hounds Design No-Pull) and reward heavily for walking at your side.
2. "Drop it" and "leave it" commands: Giant dogs with large mouths can pick up dangerous objects. These commands are safety-critical.
3. Settle/mat training: Teach your dog to go to a designated bed or mat and relax. This prevents a 150-lb dog from jumping on guests or crowding doorways.
4. Crate training: Use an XXL crate (48–54 inches long). Brands like Midwest Solutions or ProSelect Empire offer heavy-duty options suitable for giant breeds. Crate training aids housebreaking and provides a safe space.

Cost Breakdown: Purchase Price and Lifetime Expenses

Owning a giant-breed designer dog is a significant financial commitment. Here is a realistic cost breakdown based on current market conditions:

Puppy Purchase Price

First-Year Estimated Costs

• Food (large-breed kibble or balanced raw): $1,200–$2,400/year (expect to feed 5–8 cups of high-quality kibble daily for an adult; brands like Orijen Large Breed, Royal Canin Giant, or Purina Pro Plan Large Breed)
• Veterinary care (first year, including puppy vaccines, spay/neuter): $1,500–$3,000
• Supplies (XXL crate, heavy-duty leash/harness, bed, bowls): $500–$1,000
• Training classes (group puppy + basic obedience): $300–$600
• Pet insurance (recommended for giant breeds): $80–$150/month ($960–$1,800/year; providers like Trupanion, Healthy Paws, or Lemonade)
• Grooming (if long-coated, professional every 8–10 weeks): $480–$780/year

Realistic first-year total: $5,740–$11,580. Ongoing annual costs after the first year typically range from $3,500–$7,000, with veterinary expenses increasing significantly as the dog enters senior years.

Who Should (and Shouldn't) Get a Bernese St. Bernard Mix?

This Mix Is a Strong Fit For:

• Families with older children: The temperament is excellent with kids, but the sheer size makes this dog better suited for homes with children aged 8+. A 140-lb dog can accidentally knock over a toddler simply by turning around.
• Homes with large, fenced yards: While not high-energy, these dogs need space to move comfortably. A fenced yard of at least 1/4 acre is recommended.
• Cooler climates: The double coat makes this breed miserable in sustained heat. Ideal environments are northern US states, mountainous regions, or homes with reliable air conditioning.
• Experienced dog owners: Giant-breed management—joint care, bloat prevention, training a dog that outweighs many adults—requires prior dog-handling knowledge. First-time owners can succeed but should invest heavily in professional training support.
• People who are home often: This breed bonds deeply and does not tolerate long daily absences well.

This Mix Is NOT a Good Fit For:

• Apartment or small-home living (space constraints and potential breed-size restrictions from landlords)
• Hot, humid climates without reliable cooling
• Owners seeking a low-shedding or hypoallergenic dog
• Budget-conscious owners (giant-breed costs are 2–3× those of medium breeds)
• People who are away from home more than 6 hours daily on a regular basis
• Households with very young toddlers where accidental injury from the dog's size is a concern

Frequently Asked Questions

This article provides educational information and should not replace professional veterinary advice. Always consult your veterinarian regarding your dog's specific health needs, diet, and care plan. If you suspect your dog has ingested a toxic substance, contact the ASPCA Animal Poison Control Center at (888) 426-4435 (24/7, consultation fee applies).