St. Bernard Great Dane Mix: Size, Temperament & Care Guide
Everything you need to know about the St. Bernard Great Dane mix — size range, temperament variability, health risks, grooming, cost.
If you've ever watched a St. Bernard lumber across a room and a Great Dane stride like a supermodel, then pictured a dog that splits the difference — you're imagining the St. Bernard Great Dane mix. This is one of the largest designer crosses in existence, combining two true giant breeds into a dog that can easily exceed 150 pounds. But beyond the jaw-dropping size, what's it actually like to live with one?
Having worked with giant-breed owners through veterinary clinics and breed rescues, I can tell you this cross demands serious preparation. The financial commitment alone — from food to joint supplements to emergency vet care — can run $4,000 to $7,000+ annually. And because mixed breeds inherit traits unpredictably, no two St. Bernard Great Dane mixes will look, behave, or age identically.
This guide covers what you realistically need to know before bringing one home, grounded in breed standards, veterinary data, and practical ownership experience.
The Parent Breeds: St. Bernard and Great Dane
Understanding any mixed breed starts with understanding its parents. Both the St. Bernard and the Great Dane are classified as giant breeds by the American Kennel Club, but they were developed for entirely different purposes — and those origins shape what you might get in the mix.
| Trait | St. Bernard | Great Dane |
|---|---|---|
| Origin | Swiss Alps — monastery rescue dog (17th century) | Germany — boar hunting and estate guardian |
| AKC Group | Working Group | Working Group |
| Weight Range | 120–180 lb (54–82 kg) | 110–175 lb (50–79 kg) |
| Height Range | 26–30 in (66–76 cm) | 28–32 in (71–81 cm) |
| Lifespan | 8–10 years | 7–10 years |
| Coat | Short (smooth) or long (rough); dense, water-resistant | Short, smooth, single coat |
| Energy Level | Low to moderate — bursts of activity | Moderate — needs daily walks, surprisingly couch-friendly |
| Temperament | Gentle, patient, stubborn, people-oriented | Friendly, confident, sometimes reserved with strangers |
| Shedding | Moderate to heavy (seasonal blow-out) | Moderate year-round |
| Drooling | Heavy — especially after eating/drinking | Moderate to heavy |
| Trainability | Willing but slow; needs patience | Eager to please; responds well to positive methods |
The St. Bernard was bred for Alpine rescue work — trudging through deep snow, locating lost travelers, and providing warmth. That history produced a dog that's calm, cold-tolerant, and somewhat independent-thinking. The Great Dane, by contrast, was originally a boar hound — fast, powerful, and bred to hold aggressive prey until the hunter arrived. Modern Danes have been heavily selected for companionship and are far softer in temperament, but the athletic build and alertness remain.
What Two Breeds Make Up This Mix?
The St. Bernard Great Dane mix — sometimes informally called a "Saint Dane" — is a first-generation or multigenerational cross between a purebred St. Bernard and a purebred Great Dane. This is not a recognized breed by any major registry (AKC, UKC, or FCI). It's a designer cross, meaning individual dogs can vary significantly in appearance, temperament, and health profile depending on which parent's genes dominate.
Understanding Generations in Designer Crosses
F1 (First Generation): One purebred St. Bernard parent × one purebred Great Dane parent. These puppies show the widest trait variability — some lean heavily toward one parent, others split traits evenly. This is the most common generation for this particular mix.
F1B (First-Generation Backcross): An F1 St. Bernard Great Dane mix bred back to one of the parent breeds. Rarely done with this specific cross. This would produce puppies that are 75% one breed and 25% the other.
F2 (Second Generation): Two F1 St. Bernard Great Dane mixes bred together. This produces even more unpredictable results — the gene pool recombines in ways that can produce puppies looking almost entirely like one grandparent breed.
Multigen: Multiple generations of mixed-to-mixed breeding. Essentially nonexistent for this cross. Unlike Poodle mixes (Labradoodles, Goldendoodles), there's no established multigenerational breeding program for St. Bernard × Great Dane crosses.
Bottom line: Almost every St. Bernard Great Dane mix you'll encounter is an F1, and trait predictability is low.
How Big Will a St. Bernard Great Dane Mix Get?
This is a giant-breed cross, full stop. There is no "mini" version. If space, budget, or vehicle size is a concern, this mix demands honest evaluation before commitment.
| Measurement | Low End | Typical Range | High End |
|---|---|---|---|
| Weight (male) | 120 lb (54 kg) | 140–170 lb (64–77 kg) | 190+ lb (86+ kg) |
| Weight (female) | 100 lb (45 kg) | 115–145 lb (52–66 kg) | 160+ lb (73+ kg) |
| Height at shoulder | 26 in (66 cm) | 28–31 in (71–79 cm) | 33+ in (84+ cm) |
| Body length (nose to tail base) | 36 in (91 cm) | 40–46 in (102–117 cm) | 50+ in (127+ cm) |
Most individuals land somewhere between 130 and 175 pounds (59–79 kg). The height tends to favor the Great Dane parent's longer legs, while the bone thickness and barrel chest often come from the St. Bernard side. Males consistently outweigh females by 20–35 pounds (9–16 kg).
Growth is prolonged in giant breeds. Your St. Bernard Great Dane mix puppy won't reach full skeletal maturity until 18–24 months, and may continue filling out (gaining muscle and chest width) until age 3. Rapid growth phases between 3 and 8 months are when joint health is most vulnerable — discuss a giant-breed puppy feeding protocol with your veterinarian to avoid growth-related orthopedic disease.
Temperament: What to Expect (and What Might Surprise You)
Temperament is where mixed-breed variability creates the most uncertainty. Here's the honest range:
Best-Case Scenario
You get a dog that combines the St. Bernard's patience and gentleness with the Great Dane's trainability and people-orientation. The result is a calm, affectionate giant that's excellent with children, welcoming to visitors, and easy to manage despite its enormous size. These dogs are typically low-energy indoors — happy to sprawl on a rug while you work — but enjoy a solid 30–45 minute walk daily.
Challenging Scenario
You get a dog that inherits the St. Bernard's stubbornness combined with the Great Dane's occasional wariness of strangers. Now you have a 160-pound dog that refuses to move off the couch when guests arrive, leans its full weight against the leash during walks, and needs careful socialization to prevent overprotectiveness. At this size, even mild reactivity becomes a management problem — a dog that lunges at the mail carrier can pull an adult off their feet.
Common Temperament Traits Across Most Individuals
- People-oriented: Both parent breeds bond deeply with their families. Separation anxiety is a real risk if left alone 8+ hours daily.
- Moderate energy: Despite the size, neither parent is a high-drive working breed. Expect 45–60 minutes of total daily exercise (walks, yard time, gentle play).
- Food-motivated: Useful for training, dangerous for counter-surfing. A St. Bernard Great Dane mix can clear a kitchen counter without jumping.
- Sensitive to tone: Harsh corrections shut both parent breeds down. Positive reinforcement and force-free methods are the only appropriate training approaches for this cross.
- Good with children (with supervision): Size alone makes unsupervised interaction risky — a wagging tail at hip height can knock over a toddler.
Coat, Shedding & Grooming: What You'll Deal With
The coat your St. Bernard Great Dane mix inherits depends on which parent's genes express. Here are the possibilities:
| Trait | Dane-Dominant | St. Bernard-Dominant (Smooth) | St. Bernard-Dominant (Rough) |
|---|---|---|---|
| Coat length | Short (0.5–1 in) | Short to medium (1–2 in) | Medium to long (2–4 in) |
| Undercoat | Minimal to none | Dense double coat | Very dense double coat |
| Shedding level | Moderate, year-round | Heavy, seasonal blow-out + moderate daily | Heavy, seasonal blow-out + moderate daily |
| Grooming frequency | Weekly brushing | 2–3× per week; daily during blow-out | 3–4× per week; daily during blow-out |
| Professional grooming needed? | No | Rarely | Occasional (sanitary trims, matting prevention) |
Is This Mix Hypoallergenic or Low-Shedding?
No. Neither parent breed is hypoallergenic or low-shedding. The Great Dane has a short, single coat that sheds moderately year-round. The St. Bernard has a dense double coat that sheds heavily — especially during seasonal coat blows in spring and fall. There is no combination of these two breeds that produces a low-shedding dog. If you have dog allergies, this cross is not a suitable choice.
Additional Grooming Considerations
- Drool management: Both parent breeds are prolific droolers. Keep drool rags in every room. Jowls may need wiping 2–3 times daily, especially after meals and water.
- Nail trims: Giant-breed nails grow thick and fast. Trim every 2–3 weeks, or file with a Dremel-style grinder (the Dremel 7300-PT is a common choice for large breeds).
- Ear cleaning: Floppy ears (St. Bernard inheritance) trap moisture and debris. Clean weekly with a veterinary-approved ear cleanser if ears are pendant. Erect or semi-erect ears (Dane inheritance) need less frequent attention.
- Bathing: Every 6–8 weeks unless visibly dirty. Use a dog-specific shampoo — human shampoo disrupts canine skin pH.
Health Considerations: Hybrid Vigor vs. Reality
Let's address the hybrid vigor myth directly. The idea that mixed-breed dogs are automatically healthier than purebreds is an oversimplification. A 2013 study published in the Journal of Veterinary Internal Medicine found that while mixed breeds do have reduced incidence of some inherited disorders (those caused by recessive genes concentrated in closed breed pools), they remain equally susceptible to conditions that are structural or size-related.
For a St. Bernard Great Dane mix, this distinction matters enormously — because the most significant health risks are shared by both parent breeds due to giant size, not breed-specific genetics.
| Condition | Prevalence in Parent Breeds | What to Watch For | Screening/Prevention |
|---|---|---|---|
| Gastric Dilatation-Volvulus (GDV/Bloat) | Great Danes: ~5–6% lifetime risk; St. Bernards: elevated risk. Both are deep-chested giants. | Distended abdomen, unproductive retching, restlessness, collapse. Emergency — fatal within hours without surgery. | Prophylactic gastropexy (stomach tacking) during spay/neuter. Feed 2–3 smaller meals daily. Avoid exercise 1 hour before/after meals. |
| Hip Dysplasia | St. Bernards: ~25% affected (OFA data); Great Danes: ~12% affected | Hind-limb lameness, bunny-hopping gait, difficulty rising, reluctance to jump | OFA or PennHIP screening of parent dogs. Maintain lean body condition. Giant-breed puppy food to control growth rate. |
| Elbow Dysplasia | St. Bernards: ~12% affected; Great Danes: lower but present | Front-limb lameness, stiffness after rest, reluctance to descend stairs | OFA elbow screening of parents. Same growth-management strategies as hip dysplasia. |
| Dilated Cardiomyopathy (DCM) | Great Danes: one of the most predisposed breeds; St. Bernards: moderate risk | Coughing, exercise intolerance, fainting, abdominal swelling from fluid | Annual cardiac exam with auscultation; echocardiogram if murmur detected. Taurine levels may be checked. |
| Osteosarcoma (Bone Cancer) | Great Danes: significantly elevated risk; St. Bernards: elevated risk vs. general population | Persistent lameness, swelling on a limb, pain on palpation | No screening test. Early veterinary evaluation of any persistent lameness. Amputation + chemotherapy is standard treatment. |
| Wobbler Syndrome (Cervical Spondylomyelopathy) | Great Danes: one of the most predisposed breeds | Wobbly gait in hind legs, neck pain, progressive incoordination | MRI or CT for diagnosis. Surgical or medical management depending on severity. |
The combined lifespan of this mix is typically 7–10 years, consistent with both parent breeds. Some individuals reach 11 or 12, but this is the exception. Budget planning should account for higher veterinary costs in years 5+ as giant breeds age rapidly.
When to Call the Vet Immediately
These symptoms in a giant breed constitute emergencies — do not wait to see if they resolve:
- Unproductive retching or vomiting with a distended, hard abdomen (bloat/GDV)
- Sudden collapse or inability to stand
- Labored breathing, blue-tinged gums
- Seizures or loss of consciousness
- Acute, severe lameness with visible swelling on a limb
For suspected toxin ingestion, contact ASPCA Animal Poison Control: (888) 426-4435 (24/7, consultation fee applies).
Feeding, Exercise & Daily Care Costs
Giant breeds eat a lot, and feeding a St. Bernard Great Dane mix is a significant ongoing expense. Here's what realistic daily care looks like:
Nutrition
An adult weighing 140–170 lb (64–77 kg) will consume approximately 6–10 cups of high-quality dry food daily, depending on activity level and metabolism. Choose a formula that meets AAFCO standards for adult maintenance (or large-breed growth for puppies under 18 months). Expect to spend $100–$180 per month on food alone.
Key feeding guidelines for giant breeds:
- Feed 2–3 meals daily — never one large meal (reduces bloat risk)
- Use a slow-feeder bowl if your dog inhales food
- Avoid elevated feeders — research from Purdue University published in JAVMA found elevated bowls may actually increase bloat risk in large breeds
- Supplements: discuss glucosamine/chondroitin and fish oil with your veterinarian for joint support
Exercise Requirements
Despite the imposing size, this mix is not an endurance athlete. Plan for:
- Daily walks: 30–45 minutes total, split into two sessions
- Yard time: 15–30 minutes of free movement in a secure, fenced area (minimum 6-foot fence)
- Avoid: High-impact activities (agility, long-distance running, repetitive jumping) especially before 18 months when growth plates are open
- Heat sensitivity: If the St. Bernard coat is inherited, this dog overheats quickly above 80°F (27°C). Exercise in early morning/evening during summer.
Annual Cost Estimate
| Expense Category | Low Estimate | High Estimate |
|---|---|---|
| Food | $1,200 | $2,160 |
| Routine veterinary care (exams, vaccines, heartworm) | $400 | $700 |
| Preventive medications (heartworm, flea/tick) | $250 | $500 |
| Grooming supplies or professional grooming | $50 | $300 |
| Pet insurance (if enrolled) | $600 | $1,400 |
| Miscellaneous (beds, toys, leashes, crates) | $200 | $500 |
| Annual Total | $2,700 | $5,560 |
This does not include emergency veterinary care, which for a giant breed can range from $3,000–$8,000+ per incident (bloat surgery alone averages $3,000–$7,000). Pet insurance or a dedicated emergency fund is strongly recommended.
Price, Availability & Finding Your Dog
Puppy Cost
Because this is not a commonly produced designer cross, puppies are relatively uncommon. When available from small-scale breeders, expect to pay:
- From a breeder: $800–$2,500, with most litters priced around $1,200–$1,800
- From a rescue: $200–$500 adoption fee
This mix is not commonly found in dedicated "designer breed" programs. Most litters result from hobby breeders or accidental pairings. If you pursue a breeder, ask for:
- OFA hip and elbow certifications for both parent dogs
- Cardiac evaluation (OFA cardiologist clearance) for both parents
- A written health guarantee and take-back clause
- Proof that the breeder raises puppies in-home with early socialization
Rescue Availability
Giant breed mixes frequently end up in rescue — owners underestimate the size, cost, or space requirements. Check these resources:
- Giant breed-specific rescues (Great Dane rescue organizations often take Dane mixes)
- St. Bernard rescue networks
- Large-breed general rescues in your region
- Local shelters — search Petfinder using breed filters for both parent breeds
Who Is This Mix Best Suited For?
Based on the combined needs of both parent breeds, here's an honest fit assessment:
✓ Good Fit
- Homes with large, fenced yards (minimum 6-foot fence, securely anchored — these dogs can lean through weak fencing)
- Families with older children (8+) who understand how to interact with giant dogs
- Owners with prior giant-breed experience
- Households where someone is home most of the day (separation anxiety risk)
- People who don't mind drool, shedding, and a dog that takes up an entire sofa
- Owners with a realistic budget for giant-breed veterinary care
✗ Poor Fit
- Apartment living (space and exercise limitations; many landlords have weight restrictions)
- First-time dog owners without mentorship or professional trainer support
- Homes with toddlers (accidental knock-over risk is significant)
- Hot climates without reliable air conditioning (heat stroke risk)
- Tight budgets — a single emergency surgery can exceed $5,000
- Owners who travel frequently and cannot arrange giant-breed-compatible pet care
Frequently Asked Questions
Is the St. Bernard Great Dane mix good with other dogs?
Generally yes, if properly socialized during the critical window (8–16 weeks) and beyond. Both parent breeds were historically worked alongside other dogs. However, same-sex aggression can occur, particularly between intact males. Spaying/neutering reduces this risk. Always supervise initial introductions, and remember that a 150-pound dog playing too roughly can injure a smaller dog even without aggressive intent.
Can this mix live in an apartment?
It's not recommended. While neither parent breed is high-energy indoors, the sheer physical size makes apartment living challenging. Doorways, stairwells, and elevators become logistical problems. Many apartment complexes enforce weight limits of 50–80 pounds, which this mix will exceed by 3–4 months of age. A house with a fenced yard is strongly preferred.
How much training does a St. Bernard Great Dane mix need?
Basic obedience is non-negotiable — a 160-pound dog that doesn't respond to "come," "leave it," and loose-leash walking is a safety hazard. Plan for a structured puppy kindergarten class (starting after second DHPP vaccine, typically 12 weeks) followed by a basic manners course. Ongoing reinforcement is important. Use only positive reinforcement methods — treat rewards, praise, and play. Aversive tools (shock collars, prong collars) damage trust and can trigger fear-based reactivity, which is dangerous in a dog this size.
Do St. Bernard Great Dane mixes bark a lot?
Neither parent breed is known for excessive barking. St. Bernards tend to bark only when alerting, and Great Danes have a deep, impressive bark they use sparingly. Most St. Bernard Great Dane mixes are moderate barkers — they'll announce a visitor but won't carry on. However, dogs left alone for long periods may develop nuisance barking from boredom or anxiety.
What's the lifespan of a St. Bernard Great Dane mix?
Expect 7–10 years, consistent with both parent breeds. Some individuals reach 11–12 years, but giant breeds age rapidly, and quality-of-life decisions often arise around age 8–9. Proactive veterinary care, maintaining lean body condition, and joint support can help maximize healthy years. According to the Merck Veterinary Manual, giant breeds face accelerated aging compared to smaller dogs.
Should I get pet insurance for this mix?
Yes, strongly recommended. Giant breeds carry elevated risk for expensive conditions — bloat surgery ($3,000–$7,000), hip replacement ($4,000–$7,000 per hip), and cancer treatment ($5,000–$15,000+) are all realistic possibilities. Enroll while your dog is young and healthy (pre-existing conditions are excluded by all major insurers). Monthly premiums for a giant-breed puppy typically run $50–$120 depending on coverage level and deductible.
The St. Bernard Great Dane mix is a magnificent, gentle giant that rewards prepared owners with deep loyalty and a calm household presence. But "prepared" is the operative word. This is a dog that requires space, budget, time, and a willingness to accept that you won't know exactly what you're getting until your puppy grows up. If you're ready for that variability — and the slobber, and the shedding, and the joy of a 160-pound lap dog — this cross can be a wonderful companion for the years you'll share.
Aaron Whyte
All our authors care for dogs every day — read more of their work on the authors page.
