10 Best Giant Dog Breeds for Families: Complete Size & Care Guide
Discover the top giant dog breeds over 100 pounds, comparing temperament, health risks, exercise needs, and lifetime costs to find your perfect large companion.
What Makes a Dog "Giant"? Selection Criteria for This Guide
How we defined "giant" for this list:
- Minimum adult weight: 100 lb (45 kg) for males of the breed
- Recognized by a major registry: AKC, UKC, or FCI standard breeds (no experimental crosses)
- Minimum 10-year documented breed history to ensure stable temperament and predictable health profiles
- Available in the US through responsible breeders or established rescue networks
We excluded breeds that merely have "large" individuals but average under 100 lb, as well as wolf-hybrid crosses and livestock guardian breeds unsuitable for typical household living. The AKC recognizes several giant breeds, and we've supplemented their standards with health data from the Orthopedic Foundation for Animals (OFA) and breed-specific longevity studies.
Giant dogs demand more than just a bigger bag of kibble. Their rapid growth rates, joint stress, cardiac demands, and sheer spatial requirements mean you need breed-specific knowledge before committing. A Great Dane puppy can go from 15 lb to 100 lb in under eight months — and their bones are still developing until age two. That growth trajectory shapes everything from feeding protocols to exercise restrictions.
The breeds below are ranked by a composite of family-friendliness, health predictability, trainability, and suitability for first-time giant-dog owners. We've organized them into three lifestyle tiers so you can navigate based on your living situation.
Tier 1: Gentle Giants Best Suited for First-Time Owners
1. Great Dane
Size class: Super-giant (males 140–175 lb / 64–79 kg; females 110–140 lb / 50–64 kg)
Key trait: Exceptionally calm indoor temperament despite towering 30–32 inches at the shoulder
Why this breed made the list: Great Danes consistently score among the highest giant breeds for low aggression and high sociability. Their "couch potato" indoor behavior makes them surprisingly apartment-adaptable if given adequate daily walks — though a fenced yard is strongly preferred. OFA data shows a hip dysplasia prevalence of approximately 12.4%, which is moderate for a giant breed.
2. Newfoundland
Size class: Giant (males 130–150 lb / 59–68 kg; females 100–120 lb / 45–54 kg)
Key trait: Innate water rescue instinct combined with extraordinary patience with children
Why this breed made the list: Newfies have one of the lowest bite-incident rates among giant breeds and a documented history of water rescue work spanning centuries. Their thick double coat requires serious grooming commitment (expect 3–4 hours weekly of brushing during shedding season), but their temperament is nearly bulletproof. Cardiac screening via OFA shows subaortic stenosis (SAS) prevalence around 4–6% — a condition breeders should screen for.
3. Leonberger
Size class: Giant (males 120–170 lb / 54–77 kg; females 90–140 lb / 41–64 kg)
Key trait: Versatile working drive balanced with stable family-dog temperament
Why this breed made the list: Leonbergers were specifically developed in 19th-century Germany to combine the best traits of St. Bernards, Newfoundlands, and Great Pyrenees. They excel in water rescue, cart-pulling, and therapy work. Their polyneuropathy screening program (via the Leonberger Club of America) has reduced inherited neurological disease rates significantly since 2014.
Tier 2: Experienced-Owner Breeds with Higher Training Demands
4. Saint Bernard
Size class: Super-giant (males 140–180 lb / 64–82 kg; females 120–140 lb / 54–64 kg)
Key trait: Deeply loyal with strong protective instinct, yet gentle with family members
Why this breed made the list: Saint Bernards carry the legacy of Alpine rescue work, which selected for intelligence, endurance, and human focus. Their short-to-medium coat (smooth variety) is lower maintenance than a Newfie's, but drool management is a daily reality — expect to keep drool rags in every room. Gastric dilatation-volvulus (bloat) risk is elevated; prophylactic gastropexy during spay/neuter is strongly recommended and typically costs $300–$600 at time of surgery.
5. Irish Wolfhound
Size class: Super-giant/tall (males 120–160 lb / 54–73 kg, standing 32–34+ inches; females 105–130 lb / 48–59 kg)
Key trait: The tallest AKC-recognized breed, with a sight-hound's grace and a gentle demeanor
Why this breed made the list: Irish Wolfhounds are historically war dogs turned aristocratic companions. Their calm, almost cat-like indoor behavior belies their need for a securely fenced acreage for sprinting. Osteosarcoma (bone cancer) prevalence is tragically high — estimated at 15–25% of the breed — and median lifespan is only 6–8 years. This breed is for owners prepared for a shorter but deeply rewarding companionship.
6. English Mastiff
Size class: Super-giant/heavy (males 160–230 lb / 73–104 kg; females 120–170 lb / 54–77 kg)
Key trait: The heaviest British breed, with a docile, dignified temperament and minimal exercise demands
Why this breed made the list: Mastiffs are the definition of "low-energy giant." A 30-minute daily walk and some yard time satisfy most adults. Their guarding instinct is present but expressed through presence rather than aggression. However, they are prone to cystinuria (a urinary stone condition), entropion, and significant joint issues. OFA elbow dysplasia rates hover around 16%. Budget for potential joint surgery: TPLO procedures run $3,500–$5,500 per knee.
7. Tibetan Mastiff
Size class: Giant (males 90–150 lb / 41–68 kg; females 70–120 lb / 32–54 kg)
Key trait: Independent livestock guardian with intense loyalty to family and wariness of strangers
Why this breed made the list: Tibetan Mastiffs are primitive-type guardians, not typical companion dogs. They made this list because their health profile is surprisingly robust — hip dysplasia rates under 10% per OFA, and fewer inherited cardiac conditions than many European giants. However, their nocturnal barking tendencies, same-sex aggression, and resistance to obedience-style training place them firmly in the experienced-owner category.
Tier 3: Working-Line Giants for Active, Experienced Households
8. Bernese Mountain Dog
Size class: Large-to-giant (males 80–115 lb / 36–52 kg; females 70–95 lb / 32–43 kg)
Key trait: Versatile Swiss farm dog excelling in draft work, agility, and therapy roles
Why this breed made the list: While some males fall just under the 100 lb threshold, many reach giant-class weight, and their functional demands are squarely in giant-dog territory. Berners are among the most trainable of the giant breeds, thriving in obedience and rally competition. The critical drawback: histiocytic sarcoma and other cancers give this breed a median lifespan of only 7–9 years. The Bernese Mountain Dog Club of America maintains a cancer database tracking breed-specific oncology research.
9. Dogue de Bordeaux (French Mastiff)
Size class: Giant (males 110–145 lb / 50–66 kg; females 99–130 lb / 45–59 kg)
Key trait: Brachycephalic guardian with profound family bonding and moderate energy
Why this breed made the list: The Dogue is France's most ancient breed, with roots predating Roman molosser dogs. Their brachycephalic (short-muzzled) structure means heat intolerance, potential breathing difficulty, and higher anesthetic risk — always choose a vet experienced with brachycephalic breeds. Aortic stenosis and dilated cardiomyopathy (DCM) screening via echocardiogram is essential before purchase, costing $300–$500 per screening.
10. Anatolian Shepherd Dog
Size class: Giant (males 110–150 lb / 50–68 kg; females 80–120 lb / 36–54 kg)
Key trait: Turkish livestock guardian with exceptional endurance, independence, and territorial instinct
Why this breed made the list: Anatolians are among the healthiest of giant breeds — their functional selection in harsh Turkish terrain maintained genetic diversity and physical soundness. OFA hip dysplasia rates are impressively low at approximately 8%. However, they are not casual pets. They require secure 6-foot fencing (they can climb), extensive early socialization, and owners who understand livestock guardian dog (LGD) psychology. Not recommended for suburban environments without significant acreage.
Breed Comparison: How Do These Giants Stack Up?
| Breed | Weight Range (lb / kg) | Median Lifespan | Daily Exercise | Hip Dysplasia Rate (OFA) | Estimated Annual Cost |
|---|---|---|---|---|---|
| Great Dane | 110–175 / 50–79 | 7–10 years | 45–60 min | ~12.4% | $3,200–$4,800 |
| Newfoundland | 100–150 / 45–68 | 9–10 years | 40–60 min | ~15.8% | $3,500–$5,200 |
| Leonberger | 90–170 / 41–77 | 8–9 years | 60–90 min | ~13.2% | $3,400–$5,000 |
| Saint Bernard | 120–180 / 54–82 | 8–10 years | 30–60 min | ~15.0% | $3,600–$5,500 |
| Irish Wolfhound | 105–160 / 48–73 | 6–8 years | 40–60 min | ~11.5% | $3,800–$6,000 |
| English Mastiff | 120–230 / 54–104 | 6–10 years | 20–40 min | ~14.3% | $3,800–$6,200 |
| Tibetan Mastiff | 70–150 / 32–68 | 10–12 years | 30–45 min | ~9.2% | $2,800–$4,200 |
| Bernese Mountain Dog | 70–115 / 32–52 | 7–9 years | 45–75 min | ~15.7% | $3,400–$5,800 |
| Dogue de Bordeaux | 99–145 / 45–66 | 5–8 years | 30–45 min | ~17.1% | $3,600–$5,500 |
| Anatolian Shepherd | 80–150 / 36–68 | 11–13 years | 60–90 min | ~8.0% | $2,400–$3,800 |
Annual cost estimates include premium large-breed food ($80–$150/month for a 120+ lb dog), routine veterinary care, heartworm/flea/tick prevention (priced by weight class), grooming, pet insurance premiums, and miscellaneous supplies. Emergency veterinary events are not included — giant-breed owners should maintain a $3,000–$5,000 emergency fund or carry comprehensive pet insurance.
Decision Framework: Which Giant Breed Fits Your Life?
Choosing between the top three family-friendly giants — Great Dane, Newfoundland, and Leonberger — depends on specific lifestyle factors. Use this decision flowchart:
- Do you have children under 10?
→ YES: Newfoundland or Leonberger (both have documented patience with unpredictable child behavior). Great Danes are gentle but their sheer size can accidentally knock over small children during play.
→ NO: Continue to next question. - Is your primary residence an apartment or home without a fenced yard?
→ YES: Great Dane (lowest exercise drive of the three; adapts to leash-only exercise if given 2–3 structured walks daily). Newfoundlands and Leonbergers need yard access for off-leash movement.
→ NO: Continue to next question. - Are you committed to competitive dog sports (obedience, rally, draft/cart-pulling, water rescue)?
→ YES: Leonberger (most versatile working drive; excels in multiple sport venues). Newfoundlands dominate water rescue trials. Great Danes can compete but have lower drive.
→ NO: Continue to next question. - Is a lifespan over 9 years a high priority for you?
→ YES: Newfoundland (median 9–10 years, one of the longer-lived giants). Leonbergers average 8–9 years; Great Danes 7–10 but with higher variance.
→ NO: Any of the three are excellent choices. - Can you commit to heavy grooming (3+ hours weekly)?
→ YES: Newfoundland or Leonberger (both have thick double coats requiring regular maintenance).
→ NO: Great Dane (short coat, minimal grooming — a 10-minute weekly brush with a rubber curry comb suffices).
Honorable Mentions and Breeds to Consider Carefully
Honorable Mentions
Neapolitan Mastiff: A magnificent Italian guardian breed with deep wrinkles and a calm, watchful demeanor. They didn't make the main list because their extensive skin-fold care requirements (daily wrinkle cleaning to prevent yeast infections), high drool factor, and strong guarding instinct make them unsuitable for most first-time giant-dog households. Experienced owners who understand mastiff psychology will find a deeply devoted companion.
Greater Swiss Mountain Dog: Often called the "poor man's Bernese" — they share the Swiss tricolor look but with a short coat and slightly better longevity (median 9–11 years). Males typically reach 105–140 lb. They're more energetic than Berners and better suited to active hiking families. Their smaller gene pool means fewer breeders are available, and puppy prices often range $2,500–$4,000.
Cane Corso: Males reach 100–120 lb with an athletic build and strong protective drive. Corsos are highly trainable and deeply bonded to their families, but their guarding instinct, dog-selectiveness, and need for consistent experienced handling place them outside the "family giant" category for most households. They thrive with owners who have working-dog experience.
Breeds That Don't Qualify (Common Misconceptions)
German Shepherd / Rottweiler / Doberman: These are large breeds, not giant breeds. Males typically max out at 85–135 lb, and most fall well under the 100 lb giant threshold. They have different care profiles and are better categorized as "large working breeds."
Alaskan Malamute: Despite their fluffy appearance suggesting massive size, males average only 75–85 lb. They are a large breed, not giant.
Wolf-hybrid crosses: Not recognized by any major registry, unpredictable in temperament, illegal in many jurisdictions, and unsuitable as family companions regardless of size. These are excluded from all responsible breed recommendations.
Frequently Asked Questions About Giant Dog Breeds
How much does it cost to own a giant dog breed over its lifetime?
Expect $30,000–$65,000 over a giant breed's lifetime (6–13 years depending on breed). The largest cost drivers are food ($1,000–$1,800/year for premium large-breed formulas), pet insurance ($800–$2,400/year for giant breeds, as premiums scale with size), and emergency orthopedic or cardiac care. A single TPLO surgery for a torn cruciate ligament costs $3,500–$5,500, and giant breeds have elevated risk. Purchasing from a responsible breeder who performs OFA hip/elbow/cardiac clearances typically costs $2,000–$4,500 for a puppy.
What should I feed a giant breed puppy?
Giant breed puppies (those expected to reach 100+ lb at maturity) require a diet specifically formulated for large/giant breed growth. Look for the AAFCO statement: "formulated for growth/all life stages including growth of large-size dogs (70 lb or more as an adult)." Key nutritional parameters: calcium should be 1.0–1.5% on a dry matter basis, phosphorus 0.8–1.2%, and caloric density should be moderate to prevent rapid growth. Brands like Purina Pro Plan Large Breed Puppy, Royal Canin Giant Puppy, and Hill's Science Diet Large Breed Puppy meet these criteria. Never supplement calcium beyond what the food provides — excess calcium disrupts bone remodeling and increases osteochondrosis risk. Feed measured meals (not free-choice) and follow the bag's feeding guide by projected adult weight, not current weight.
Do giant dogs need more exercise than smaller breeds?
Not necessarily — and this is a common misconception. Many giant breeds (English Mastiff, Dogue de Bordeaux, Great Dane) are relatively low-energy adults who need 30–60 minutes of moderate activity daily. What giant breeds DO need is structured, low-impact exercise during their extended growth period (birth to 18–24 months). Avoid forced running, jumping from heights, and repetitive fetch on hard surfaces until growth plates close. Your veterinarian can take radiographs to confirm growth plate closure, typically between 18–24 months depending on breed. After maturity, swimming is the ideal giant-breed exercise — it builds muscle without joint impact.
Are giant dogs good with children?
Breed temperament matters more than size. Newfoundlands and Leonbergers are consistently ranked among the most child-tolerant breeds in existence. However, any dog over 100 lb can accidentally injure a toddler through normal movement — a Great Dane's tail at wagging height is at a 3-year-old's face level. Always supervise interactions, teach children to respect the dog's resting space, and use positive reinforcement training to teach your giant dog calm behavior around running children. Never use aversive methods (shock collars, prong collars, alpha rolls) — these increase fear-based reactivity risk in any breed.
What health screenings should I demand from a giant breed breeder?
At minimum, require OFA (or PennHIP) hip certifications for both parents, OFA elbow certifications, and a cardiac evaluation (echocardiogram reviewed by a veterinary cardiologist). Breed-specific additions: Leonbergers should have polyneuropathy DNA testing (LPN1 and LPN2); Newfoundlands should have cystinuria DNA testing; Irish Wolfhounds should have cardiac screening for DCM; Bernese Mountain Dogs should have OFA shoulder evaluations. Ask to see the actual OFA certificates — not just verbal assurances — and verify them on the OFA website using the dog's registration number. Responsible breeders will also have a take-back clause in their contract, guaranteeing they'll accept the dog back at any point in its life if you cannot keep it.
Is pet insurance worth it for giant breeds?
For giant breeds specifically, pet insurance is strongly recommended unless you can comfortably self-fund $5,000–$15,000 in emergency veterinary costs. Giant breeds have higher rates of bloat (GDV), cruciate ligament tears, hip dysplasia requiring surgery, and cardiac disease — all of which carry bills in the $3,000–$10,000+ range. Enroll your puppy at 8 weeks before any pre-existing conditions are documented. Companies like Trupanion, Healthy Paws, and Nationwide offer giant-breed plans, but expect monthly premiums of $70–$200 depending on breed, age, and coverage level. Read the fine print on hereditary condition coverage — some plans exclude hip dysplasia or impose waiting periods of 12+ months for orthopedic conditions.
This guide is for informational purposes. Always consult your veterinarian before making decisions about breed selection, nutrition, exercise protocols, or health management for your dog. Breed-specific health data referenced from the Orthopedic Foundation for Animals and the Merck Veterinary Manual.
Dr. Hannah Wickes
All our authors care for dogs every day — read more of their work on the authors page.
