How Big Do Great Pyrenees Get? Full Size, Growth & Care Guide
How big do Great Pyrenees get? Discover adult weight, height, growth timelines, temperament, health risks, grooming needs, and true ownership costs.
Just How Big Do Great Pyrenees Get? The Quick Answer
If you're researching this majestic mountain breed, the number one question is almost always about size. Great Pyrenees are a giant breed — one of the largest livestock guardian dogs in the world. Adult males typically weigh 100–160 lb (45–73 kg) and stand 27–32 inches (69–81 cm) at the shoulder. Females are slightly smaller at 85–115 lb (39–52 kg) and 25–29 inches (63–74 cm). Some males exceed 160 lb, though this is outside the AKC breed standard and often signals excess weight rather than healthy frame size.
Originally bred to guard flocks against wolves and bears in the Pyrenees Mountains between France and Spain, these dogs carry their mass with a calm, deliberate presence. Their thick double coat adds visual bulk, making them appear even larger than their already-impressive measurements suggest.
| Attribute | Detail |
|---|---|
| Size Class | Giant |
| Male Weight | 100–160 lb / 45–73 kg |
| Female Weight | 85–115 lb / 39–52 kg |
| Male Height | 27–32 in / 69–81 cm |
| Female Height | 25–29 in / 63–74 cm |
| Lifespan | 10–12 years |
| Coat Type | Double coat — dense undercoat, long flat outer coat |
| Energy Level | Low to moderate |
| Grooming | High — weekly brushing, seasonal blow-outs |
| Family Fit | Excellent with children; moderate with other pets |
Growth Timeline: From Fluffy Puppy to Gentle Giant
Great Pyrenees puppies grow rapidly in their first year but don't reach full skeletal maturity until 18–24 months. Muscle fill and chest width continue developing up to age 3. Here's what to expect at each milestone:
| Age | Average Weight (Male) | Average Weight (Female) | Notes |
|---|---|---|---|
| 8 weeks | 15–20 lb / 7–9 kg | 12–17 lb / 5–8 kg | Ready to go home; rapid growth phase begins |
| 3 months | 30–40 lb / 14–18 kg | 25–35 lb / 11–16 kg | Growth plates wide open; avoid forced exercise |
| 6 months | 55–75 lb / 25–34 kg | 45–60 lb / 20–27 kg | ~60% of adult height reached |
| 12 months | 85–120 lb / 39–54 kg | 70–95 lb / 32–43 kg | Near adult height; still filling out |
| 18 months | 100–145 lb / 45–66 kg | 80–110 lb / 36–50 kg | Skeletal maturity approaching |
| 24 months | 110–160 lb / 50–73 kg | 85–115 lb / 39–52 kg | Full adult size; chest continues widening to age 3 |
Practical tip: Feed a large-breed puppy formula (AAFCO-certified) until at least 12–14 months. Rapid growth in giant breeds is a known risk factor for developmental orthopedic diseases like hip dysplasia. Look for kibble labeled for "large breed puppies" — these formulas restrict calcium and caloric density to slow growth to a safer rate.
Origin and History: Mountain Guardians of the Pyrenees
The Great Pyrenees (known as the Chien de Montagne des Pyrénées in France) traces back at least 3,000 years to livestock guardian dogs of Asia Minor that migrated westward with nomadic herders. By the 1400s, the breed was well-established in the Pyrenees Mountains, where they protected sheep from wolves and bears at elevations above 6,000 feet.
In 1675, King Louis XIV declared the Great Pyrenees the Royal Dog of France, elevating their status beyond farm work. The breed arrived in North America in the 1830s, and the American Kennel Club recognized them in 1933. Today, they serve dual roles: active livestock guardians on working ranches and devoted family companions in suburban homes.
Temperament: What Living With a Great Pyrenees Is Really Like
Great Pyrenees are defined by five core temperament traits that every prospective owner should understand:
1. Independent Thinkers
Bred to make decisions alone while guarding flocks, Pyr dogs assess situations themselves before responding. This means they may not obey commands instantly — not out of defiance, but because they're evaluating whether the command makes sense. Don't mistake this for low intelligence; it's a working-dog survival trait.
2. Nocturnal Vigilance
These dogs are naturally more alert at night. In a home setting, this translates to barking at sounds you won't even hear — a neighbor's car door, a raccoon two houses down. If you're a light sleeper, this is a genuine lifestyle consideration.
3. Calm Indoors, Purposeful Outdoors
Despite their size, adult Great Pyrenees are remarkably calm inside the house. They'll claim a cool tile floor or a large dog bed and stay put for hours. Outside, they move with a slow, deliberate patrol pattern — scanning, sniffing, and monitoring their territory.
4. Gentle With Children
Their patience with kids is legendary among livestock guardian breeds. A well-socialized Pyr will tolerate toddler ear-pulls and teenage roughhousing with stoic calm. That said, any 120-lb dog can accidentally knock over a small child, so supervision is essential.
5. Reserved With Strangers
They won't greet visitors with tail wags like a Labrador. A Pyr will observe newcomers from a distance, position themselves between the stranger and their family, and warm up slowly — usually within 15–30 minutes once they've assessed the situation as non-threatening.
Exercise & Activity: Less Than You'd Expect for a Giant
Great Pyrenees have low to moderate exercise needs compared to similarly-sized active breeds like the German Shepherd or Bernese Mountain Dog.
Daily exercise target: 30–45 minutes of moderate activity, split into two sessions.
Ideal activities:
- Two 15–20 minute leash walks (morning and evening)
- Supervised yard time for free roaming and territory patrol
- Low-impact hiking on shaded trails (avoid heat — they overheat easily above 75°F / 24°C)
- Mental stimulation: scent games, puzzle feeders, obedience practice
Avoid: Long-distance running, agility courses, or forced exercise on hard surfaces, especially before 18 months when growth plates are still closing.
A bored Pyr won't necessarily become destructive indoors — they're more likely to develop nuisance barking or attempt to roam beyond your property. A secure fence (minimum 6 feet / 1.8 m) is non-negotiable; these dogs have a strong instinct to expand their patrol territory.
Health Issues: Breed-Specific Risks and Prevalence
Like many giant breeds, Great Pyrenees face specific health challenges. The Orthopedic Foundation for Animals (OFA) and veterinary research have documented several conditions with notable prevalence in the breed. Always consult your veterinarian for diagnosis and treatment — this information helps you ask informed questions at checkups.
| Condition | Prevalence | Onset | Management |
|---|---|---|---|
| Hip Dysplasia | ~12% OFA-evaluated dogs rated dysplastic | 4–12 months (signs); confirmed at 24 months | Weight control, joint supplements (glucosamine/chondroitin), surgical options for severe cases |
| Osteosarcoma (Bone Cancer) | Higher than general population; giant breed risk factor | Typically 7–10 years | Amputation + chemotherapy; median survival 10–12 months with treatment |
| Gastric Dilatation-Volvulus (Bloat/GDV) | Deep-chested giant breed — elevated lifetime risk | Any age; most common 4–7 years | Emergency surgery required; preventive gastropexy recommended during spay/neuter |
| Canine Multifocal Osteosarcoma / Bone Cysts | Rare but documented in breed | Young adults 1–3 years | Monitoring, surgical intervention if symptomatic |
| Neuronal Degeneration (Lysosomal Storage Disease) | Very rare; autosomal recessive genetic condition | 6–12 months | No cure; DNA test available for carrier screening |
🚨 Emergency — Call your vet or emergency clinic NOW if your Pyr shows:
- Distended, hard abdomen with unproductive retching (bloat/GDV — fatal within hours without surgery)
- Sudden hind-limb lameness or inability to rise (possible fracture or neurological event)
- Difficulty breathing, blue-tinged gums, or collapse
Prevention strategy: Ask your breeder for OFA hip and elbow scores for both parents. Request proof of DNA testing for neuronal degeneration. Schedule annual wellness exams with your veterinarian, and discuss prophylactic gastropexy (stomach tacking) at the time of spay or neuter — this procedure reduces GDV risk by over 90%.
Grooming: Managing That Magnificent Double Coat
The Great Pyrenees coat is a functional marvel — a dense, woolly undercoat beneath a long, flat, weather-resistant outer coat that's predominantly white (sometimes with badger, gray, or tan markings). It's designed for sub-zero mountain temperatures, which means it's extremely effective at insulation — and at covering your furniture in white fur.
Weekly grooming routine (year-round):
- Brush 2–3 times per week with a slicker brush and undercoat rake. Focus on feathering behind the ears, the "mane" around the neck, and the breeches (rear leg feathering) — these areas mat first.
- Check and clean ears weekly. Drop ears trap moisture; wipe with a veterinarian-approved ear cleaner to prevent yeast infections.
- Trim nails every 2–3 weeks. At 100+ lb, overgrown nails alter gait and stress joints.
Seasonal "blow coat" (spring and fall): Expect 2–4 weeks of heavy shedding where the undercoat releases in clumps. During blow-out periods, daily brushing with a de-shedding tool (such as an undercoat rake or deshedding comb) is necessary. A professional grooming session ($60–$100 depending on your region) for a bath and high-velocity blow-out can save your sanity during peak shedding.
Never shave a Great Pyrenees. The double coat regulates temperature in both heat and cold. Shaving disrupts the coat structure, and it may never grow back correctly — leaving your dog more vulnerable to sunburn and heat, not less.
Training & Intelligence: Patience Is Everything
Trainability rating: 3/5 — Intelligent but independent. They learn commands quickly but comply selectively.
Great Pyrenees respond best to positive reinforcement and force-free training methods. Harsh corrections, prong collars, shock collars, or alpha rolls will damage your relationship and can trigger shutdown or defensive behavior in this sensitive breed.
What works:
- Short training sessions (5–10 minutes) — they lose interest in repetitive drills
- High-value food rewards (freeze-dried liver, boiled chicken) — Pyr dogs are often food-motivated
- Early socialization (8–16 weeks): expose to diverse people, surfaces, sounds, and other animals
- Consistent boundaries — they'll test fences, counters, and rules if given any inconsistency
Key challenges: Recall is notoriously difficult because their guarding instinct drives them to patrol wide areas. Many Pyr owners use a secure yard as the primary off-leash area and keep walks on a 6-foot leash. A front-clip harness (such as a Ruffwear Front Range or similar) gives better control than a collar on a 120-lb dog that decides to pull.
Family Suitability: Kids, Pets, and Living Spaces
✅ Strengths for Families
- Exceptionally patient and gentle with children of all ages
- Natural protective instinct — watchful without being aggressive
- Calm indoor demeanor — not hyperactive or bouncy
- Tolerates cold climates beautifully
- Low exercise needs relative to size
⚠️ Considerations for Families
- Nighttime barking can disturb neighbors in close housing
- Heavy shedding requires constant cleaning
- Not suited for apartments — need yard space and room to move
- Can be same-sex dog-aggressive, especially males
- Drooling and "Pyr butt" (fecal matter sticking to rear feathering) are daily realities
With children: Excellent. Supervise toddlers simply because a 120-lb dog turning around can knock a small child over. Teach children to respect the dog's resting space.
With other dogs: Moderate. They generally coexist well with opposite-sex dogs. Same-sex pairings, particularly two intact males, carry a higher risk of conflict. Early socialization and proper introductions improve outcomes significantly.
With cats and small animals: Variable. A Pyr raised with cats typically accepts them as part of their "flock." Introducing an adult Pyr to a household cat requires slow, managed introductions over several weeks.
Apartment living: Not recommended. Their size, barking tendencies, and need for a secure outdoor patrol area make them poorly suited for apartments or dense townhome communities. A house with a fenced yard (minimum 6-foot fence) is ideal.
Cost of Ownership: Budgeting for a Giant Breed
Great Pyrenees are expensive to maintain simply because everything costs more for a 100+ lb dog — food, medication, bedding, and veterinary care all scale with size.
| Expense Category | First Year | Annual (Ongoing) |
|---|---|---|
| Puppy purchase (responsible breeder) | $1,500–$3,500 | — |
| Adoption/rescue fee (alternative) | $300–$600 | — |
| Food (large-breed kibble, ~6–8 cups/day) | $900–$1,400 | $800–$1,200 |
| Veterinary care (vaccines, wellness, preventives) | $600–$1,200 | $400–$800 |
| Heartworm/flea/tick preventives | $200–$400 | $200–$400 |
| Grooming (professional sessions + tools) | $300–$600 | $250–$500 |
| Supplies (XL crate, bed, leash, harness) | $300–$600 | $100–$200 (replacement) |
| Pet insurance (recommended for giant breeds) | $600–$1,200 | $600–$1,200 |
| Estimated Total | $5,300–$9,900 | $2,350–$4,300 |
Hidden costs to plan for: Giant-breed emergency surgery (bloat repair can cost $3,000–$7,000), orthopedic procedures for hip dysplasia ($3,500–$7,000 per hip), and end-of-life care. Pet insurance is strongly recommended — premiums for a Great Pyrenees puppy typically range from $50–$100/month depending on coverage level and deductible.
Is a Great Pyrenees Right for a First-Time Owner?
Honestly? It depends on your lifestyle more than your experience level. Great Pyrenees are not the most challenging breed to train (that title belongs to dogs with higher drive, like Belgian Malinois), but their size, stubbornness, barking, and grooming needs can overwhelm first-time owners who haven't done their homework.
You're well-suited for a Pyr if you:
- Have a fenced yard in a suburban or rural area
- Don't mind white fur on everything you own
- Can tolerate nighttime barking or live where it won't disturb neighbors
- Have the budget for giant-breed food and veterinary costs
- Are patient with training and don't need instant obedience
- Want a calm, watchful companion rather than an athletic adventure buddy
Consider a different breed if you:
- Live in an apartment or have close neighbors sensitive to barking
- Want a highly obedient, competition-level obedience dog
- Don't have time for regular grooming
- Are on a tight budget — giant breeds are expensive across the board
Frequently Asked Questions
How big does a Great Pyrenees get compared to other giant breeds?
Great Pyrenees are comparable in height to breeds like the Bernese Mountain Dog but often heavier. A male Pyr at 100–160 lb is similar to a Newfoundland (100–150 lb) but lighter than an English Mastiff (160–230 lb). They're noticeably larger than a Golden Retriever (55–75 lb) or German Shepherd (50–90 lb).
At what age is a Great Pyrenees fully grown?
Skeletal growth is mostly complete by 18–24 months, but chest width and muscle mass continue developing until age 3. Most Pyr dogs reach their full adult weight between 2 and 3 years old.
How much exercise does a Great Pyrenees need daily?
30–45 minutes of moderate activity per day, ideally split into two walks plus yard time. They are not endurance athletes — skip the 5-mile runs and opt for leisurely strolls and mental enrichment instead.
What health problems are Great Pyrenees most prone to?
The most significant breed-specific risks are hip dysplasia (~12% prevalence), gastric dilatation-volvulus (bloat), and osteosarcoma (bone cancer). Responsible breeders screen for hip scores and genetic conditions. Always consult your veterinarian about breed-appropriate screening and preventive care.
Are Great Pyrenees good with children and other pets?
Yes — they're among the most patient breeds with children. With other dogs, they do best with opposite-sex companions. Cats are usually accepted if introduced early. Their guarding instinct means they'll protect all family members, including other pets they consider part of their flock.
How much does a Great Pyrenees cost to buy and maintain annually?
Expect $1,500–$3,500 for a puppy from a responsible breeder (or $300–$600 through rescue). Annual care costs run $2,350–$4,300 including food, veterinary care, grooming, preventives, and insurance. First-year total costs typically fall between $5,300 and $9,900.
Do Great Pyrenees bark a lot?
Yes. Barking is a deeply ingrained guarding behavior — they bark to alert, to patrol boundaries, and in response to nighttime sounds. Training can reduce nuisance barking but will never eliminate it entirely. This is the number one reason Pyr dogs are surrendered to rescues.
Sources: American Kennel Club — Great Pyrenees Breed Standard, Orthopedic Foundation for Animals, Merck Veterinary Manual.
Dr. Hannah Wickes
All our authors care for dogs every day — read more of their work on the authors page.
