Great Pyrenees Great Dane Mix: Size, Temperament & Care Guide

If you have ever stood next to a Great Dane and thought, "What if this dog were even fluffier?" — you are not alone. The Great Pyrenees Great Dane mix (sometimes called the Great Pyredane) is one of the most visually striking designer crosses in the giant-breed world. Combining the elegant, athletic frame of the Great Dane with the thick, weather-resistant double coat and guardian instincts of the Great Pyrenees, this cross produces a dog that routinely tips the scales past 120 pounds and stands taller than most toddlers.

But giant size comes with giant responsibilities — and giant variability. Because this is a first-generation or early-generation cross with no established breed standard, individual puppies can look, behave, and grow very differently from their littermates. This guide breaks down what you can reasonably expect, what remains unpredictable, and how to decide whether this mix belongs in your household.

The Parent Breeds: What You Are Working With

Understanding a mixed-breed dog starts with understanding its foundation. Both the Great Dane and the Great Pyrenees are ancient, purpose-bred working dogs — but their jobs, temperaments, and care needs diverge significantly.

These two breeds share giant stature and a generally calm indoor demeanor, but they differ sharply in independence, coat care, and vocal tendencies. The mix you get depends heavily on which parent's genes dominate in any given puppy.

Generation Types: F1, F1B, and Multigen Explained

For the Great Pyrenees Great Dane mix, nearly all puppies you will encounter are F1 crosses. This is not a mix with an established multigenerational breeding program the way Goldendoodles or Labradoodles have. That means you should expect significant variability — even between littermates — and plan accordingly.

Size Range: How Big Will a Great Pyrenees Great Dane Mix Get?

This is where prospective owners most often underestimate the commitment. Both parent breeds are giants, and their cross reliably produces very large dogs.

A few important notes on growth: giant-breed puppies grow rapidly but do not reach full skeletal maturity until 18–24 months. Feeding a large-breed puppy formula that meets AAFCO growth standards with controlled calcium (1.0–1.5% on a dry matter basis) is critical to reducing the risk of developmental orthopedic diseases like hip dysplasia and hypertrophic osteodystrophy. Never free-feed a giant-breed puppy.

Coat Types and Grooming: What to Expect

Coat inheritance is one of the most unpredictable traits in this cross. Because the Great Dane carries genes for a short, smooth single coat and the Great Pyrenees carries genes for a long, dense double coat, F1 puppies can land anywhere on that spectrum.

Three Common Coat Outcomes

• Dane-dominant coat: Short, smooth, single-layered. Moderate year-round shedding. Minimal grooming — a rubber curry brush once a week, occasional baths. This is the easiest outcome for grooming but offers less cold-weather protection.
• Pyrenees-dominant coat: Long (3–5 inches), thick double coat with a soft undercoat and coarser guard hairs. Heavy seasonal shedding ("coat blow") once or twice a year. Requires brushing 3–4 times per week minimum, with an undercoat rake during shedding season. Expect significant fur accumulation in your home.
• Intermediate coat: Medium-length (1.5–3 inches), semi-dense, possible feathering on legs and tail. Moderate-to-heavy shedding. Requires brushing 2–3 times per week. This is the most common outcome in F1 crosses.

Grooming Cost Estimates

For a Pyrenees-coated or intermediate-coated Great Pyredane, professional grooming sessions typically cost $80–$150 per visit due to the dog's enormous size. Most owners budget 4–6 professional sessions per year ($320–$900 annually) and handle routine brushing at home. Dane-coated dogs can skip professional grooming entirely with consistent home care.

Temperament Range: Best-Case and Challenging Scenarios

Temperament is where the variability of this cross becomes most apparent — and most consequential. You are combining a breed known for its clownish friendliness (the Dane) with a breed known for its nocturnal barking and fierce independence (the Pyrenees). The result can be wonderful or frustrating depending on which traits surface.

Best-Case Temperament Profile

A well-socialized Great Pyredane inherits the Dane's affectionate, people-oriented nature and the Pyrenees' calm, steady confidence. These dogs are gentle with children, tolerant of household chaos, reasonably trainable with positive reinforcement methods, and protective without being aggressive. They tend to be low-energy indoors — essentially a very large lap dog — and require only moderate daily exercise.

Challenging Temperament Scenarios

• Independent streak + large size: If the dog inherits the Pyrenees' independent thinking and the Dane's physical power, leash walking can become a genuine safety issue. A 150-pound dog that decides to pull toward something is difficult for most handlers to manage. Front-clip harness training from puppyhood is essential.
• Nighttime barking: Great Pyrenees were bred to bark at predators through the night. If this trait surfaces, expect vocalization between 10 PM and 4 AM, particularly at outdoor sounds. This makes the mix a poor fit for apartments, townhouses, or neighborhoods with close neighbors.
• Same-sex dog aggression: Both breeds can show same-sex dog aggression, particularly males. Early and ongoing socialization with other dogs is important, but genetics play a role you cannot fully override.
• Prey drive: Great Danes were originally bred to hunt boar. Some individuals carry strong prey drive toward smaller animals. If you have cats or small dogs, introduce carefully and supervise always.

Training Approach

This mix responds best to positive reinforcement — high-value food rewards, praise, and patience. Force-free methods work well because both breeds are sensitive to harsh handling, and aversive tools (shock collars, prong collars, alpha rolls) damage trust and can trigger fear-based reactivity in a dog this large. Start puppy socialization classes by 12–16 weeks, and continue structured training through at least 18 months. Consult your veterinarian about safe exercise limits during growth phases to protect developing joints.

Health Considerations: Hybrid Vigor Myth vs. Reality

Let's address the "hybrid vigor" claim directly: crossbreeding two purebred dogs does not automatically produce healthier offspring. Hybrid vigor (heterosis) primarily applies when crossing genetically distant populations that have accumulated different recessive mutations. Both the Great Dane and Great Pyrenees are large-to-giant European breeds with overlapping health risks. The cross may reduce the incidence of breed-specific recessive conditions, but it does not eliminate shared giant-breed health problems.

Health Conditions to Screen For

Bloat (GDV) deserves special attention. Both parent breeds are deep-chested giants, placing this mix at very high risk for gastric dilatation-volvulus — a life-threatening emergency where the stomach fills with gas and twists. According to the AVMA, GDV is fatal without immediate surgical intervention. Discuss prophylactic gastropexy (stomach tacking) with your veterinarian at the time of spay or neuter. This preventive surgery reduces GDV recurrence risk by over 95% and adds approximately $300–$600 to the spay/neuter cost.

Expected Lifespan

Great Pyredanes typically live 8–11 years. This falls between the Dane's shorter lifespan (7–10 years) and the Pyrenees' longer one (10–12 years). Giant breeds age faster than smaller dogs, and you should plan for senior-care costs — including joint supplements, pain management, and mobility aids — beginning around age 6 or 7.

Cost Breakdown: Purchase Price and Lifetime Expenses

Puppy Purchase Price

Because this is an uncommon designer cross, pricing varies widely:

• Responsible breeder (health-tested parents): $1,500–$3,000
• Casual/backyard breeder: $500–$1,200 (not recommended — health clearances rarely provided)
• Rescue/adoption: $200–$500 through breed-specific rescues or giant-breed rescue organizations

Finding this specific cross in rescue is uncommon but not impossible. Giant-breed rescues like Great Pyrenees Rescue and Great Dane rescue networks occasionally take in mixed-breed dogs. Check Petfinder and Adopt-a-Pet with both parent breed names as search filters.

First-Year Cost Estimate

Ongoing annual costs after the first year typically run $3,500–$6,500, with veterinary expenses increasing significantly after age 7. Giant-breed pet insurance premiums are among the highest in the industry, but given the cost of treating DCM ($5,000–$15,000+), bloat surgery ($3,000–$7,000), or hip replacement ($5,000–$8,000 per hip), insurance is a financially sound decision for this mix.

Who Should (and Shouldn't) Get a Great Pyrenees Great Dane Mix

This Mix Suits You If:

• You have a home with a large, securely fenced yard (minimum 6-foot fence — both breeds can jump or climb)
• You have experience handling large, strong dogs and understand leash mechanics, body conditioning, and canine body language
• You can afford $4,000–$6,500 annually in care costs and maintain a $3,000–$5,000 emergency veterinary fund
• You live in a detached home or rural property where nighttime barking will not disturb neighbors
• You want a calm, low-energy companion that still needs daily walks and mental stimulation
• You have children old enough (8+ years) to interact safely with a dog that can accidentally knock them over

Look Elsewhere If:

• You live in an apartment, condo, or townhouse with shared walls
• This would be your first dog — the combination of giant size and potential stubbornness is not beginner-friendly
• You have cats, small dogs, or livestock (prey drive risk varies by individual and cannot be predicted in a puppy)
• You cannot commit to 18–24 months of structured training and socialization
• You are uncomfortable with a dog that may outlive its own body — giant breeds often face difficult end-of-life decisions by age 9 or 10
• You have allergies to dog dander — this mix is not hypoallergenic

Frequently Asked Questions

What two breeds make up the Great Pyrenees Great Dane mix?

This cross combines a purebred Great Dane (a German-origin mastiff-type breed historically used for boar hunting) with a purebred Great Pyrenees (a French/Spanish mountain livestock guardian breed). The resulting mix inherits giant size from both parents, with coat type, temperament, and health risks varying by individual.

How big will a Great Pyrenees Great Dane mix get?

Most adults weigh between 100–160 lb (45–73 kg) and stand 28–32 inches (71–81 cm) at the shoulder. Males tend toward the larger end. Some individuals exceed 180 lb (82 kg). Full physical maturity takes 18–24 months.

What will the temperament be like?

Expect a calm, affectionate dog indoors with moderate-to-low energy. The biggest variables are independence level (Dane-leaning dogs are more biddable; Pyrenees-leaning dogs are more stubborn), barking tendency (Pyrenees influence increases nighttime vocalization), and protectiveness. Early socialization and positive reinforcement training from 8 weeks onward are essential regardless of which traits emerge.

Is the Great Pyrenees Great Dane mix hypoallergenic?

No. Neither parent breed is hypoallergenic. Shedding ranges from moderate (Dane-coated) to extremely heavy (Pyrenees-coated). This mix is not suitable for allergy sufferers.

What health issues might this mix inherit?

The most significant shared risks are hip dysplasia, gastric dilatation-volvulus (bloat), dilated cardiomyopathy, osteosarcoma, and hypothyroidism. Request OFA hip and elbow scores, a cardiac evaluation, and a thyroid panel from the breeder for both parent dogs. Discuss prophylactic gastropexy with your veterinarian.

How much does a Great Pyrenees Great Dane mix cost?

From a responsible breeder, expect $1,500–$3,000 for a puppy. Adoption through rescue typically costs $200–$500. First-year total expenses (including food, veterinary care, supplies, training, and insurance) run $4,800–$9,400. Ongoing annual costs are $3,500–$6,500.

Are Great Pyrenees Great Dane mixes good with children?

Generally yes — both parent breeds are known for gentleness with family members. However, a dog weighing 120+ pounds can unintentionally knock over small children. Supervise all interactions, teach children to respect the dog's space, and wait until children are at least 8 years old before bringing home a giant-breed puppy.