Great Pyrenees Mixed with Collie: The Complete Pyrenees Collie Guide

If you've ever watched a large, fluffy dog patrol a backyard with the quiet intensity of a guardian and the bright-eyed alertness of a herder, you may have been looking at a Great Pyrenees mixed with Collie — sometimes called the Pyrenees Collie. This designer cross combines two of the most intelligent working breeds in the canine world, and the result can be a deeply loyal, strikingly beautiful companion. But blending a 100-pound livestock guardian with a high-drive herding dog also produces a dog that demands experienced handling, serious grooming commitment, and a household prepared for significant variability in temperament and appearance.

This guide breaks down exactly what prospective owners should expect from a Great Pyrenees mixed with Collie, drawing on breed standards, veterinary data, and real-world owner experiences. Because mixed-breed dogs inherit traits unpredictably, we'll focus on ranges, probabilities, and practical decision frameworks rather than guarantees.

Parent Breed Breakdown: Great Pyrenees Meets Collie

Understanding any designer mix starts with its foundation breeds. The Great Pyrenees and the Collie (typically the Rough Collie in these crosses, though Smooth Collies are occasionally used) bring very different working histories to the table.

The contrast is significant. The Great Pyrenees was bred to make independent decisions while guarding flocks in the Pyrenees Mountains between France and Spain — often working without human direction for days. The Collie, by contrast, was shaped by centuries of working alongside shepherds in the Scottish Highlands, reading subtle hand signals and voice commands. When these two approaches merge in a single dog, the behavioral outcome depends heavily on which parent's instincts dominate.

How Big Will a Great Pyrenees Mixed with Collie Get?

Size is one of the more predictable aspects of this cross — but only within a range. Because the Great Pyrenees is substantially larger than the Collie, most first-generation (F1) puppies land somewhere between the two parents.

Great Pyrenees Collie Mix: Estimated Size Ranges

Measurement	Low End	Typical Range	High End
Weight (adult)	55 lb (25 kg)	70–95 lb (32–43 kg)	110+ lb (50+ kg)
Height at shoulder	22 in (56 cm)	25–29 in (64–74 cm)	31+ in (79+ cm)

Males trend toward the upper ranges; females toward the lower. However, genetics don't split evenly. An F1 puppy might inherit the Pyr's bone structure with the Collie's lighter frame, or vice versa. By 16 weeks, a veterinarian can estimate adult weight using growth curve charts, but even then, expect a margin of error of roughly 10–15%.

For households with small children or limited space, plan for the upper end of the range. A 95-pound dog that leans into you on the couch takes up more room than a 55-pound dog that curls into a ball — and most Pyr-Collie mixes lean large.

Generations Explained: F1, F1B, and Multigen Crosses

Most Great Pyrenees mixed with Collie dogs available through breeders or rescues are F1 crosses. This is partly because the mix is not yet a "branded" designer breed like the Labradoodle or Goldendoodle — there's no established multigen breeding program producing consistent litters. If a breeder advertises F2 or multigen Pyrenees Collies, ask for documentation of parentage and health testing across multiple generations.

Temperament: What to Expect from a Pyrenees Collie Mix

This is where individual variation matters most. The Great Pyrenees and the Collie have fundamentally different behavioral blueprints, and a mixed puppy can inherit any combination of these traits.

Best-Case Temperament Scenario

The dog inherits the Collie's trainability and social responsiveness alongside the Pyr's calm confidence and gentle protectiveness. Result: a large, steady dog that is alert without being reactive, trainable without being hyperactive, and devoted to the family without being clingy. These dogs excel in activities like therapy work, cart pulling, and advanced obedience when trained with positive reinforcement methods.

Challenging Temperament Scenario

The dog inherits the Pyr's independent decision-making and nocturnal barking alongside the Collie's herding drive and sensitivity. Result: a large dog that tries to herd children by nipping at heels, barks at every sound after midnight, resists recall commands because it's "making its own decisions," and becomes anxious when left alone. This combination requires an experienced owner who understands both guardian-breed and herding-breed psychology.

Common Behavioral Patterns to Prepare For

• Herding instinct: Even Pyr-dominant mixes may show circling, staring, or heel-nipping behaviors, especially toward children or smaller pets.
• Guardian barking: Deep, booming bark triggered by unfamiliar sounds, especially at night. Not easily trained out — it's hardwired.
• Stranger wariness: Both breeds are reserved with strangers. Early, positive socialization (before 16 weeks) is critical to prevent fear-based reactivity.
• High intelligence, selective obedience: These dogs understand commands quickly but may choose not to comply if they perceive a more important job (guarding, herding). Force-free training with high-value rewards works best; aversive methods like shock collars will damage trust and increase anxiety in this sensitive cross.

Coat, Shedding, and Grooming: The Reality Check

Neither the Great Pyrenees nor the Collie is a low-shedding breed, and their mix is not hypoallergenic. In fact, this cross typically inherits a dense double coat that requires significant maintenance.

Coat Type Possibilities

Coat Inheritance Patterns in Great Pyrenees × Collie Mixes

Coat Characteristic	Pyr-Leaning	Balanced Mix	Collie-Leaning
Length	Medium-long, straight to slightly wavy	Long, may have wave	Long, straight with prominent ruff
Density	Very dense undercoat	Dense undercoat	Moderate to dense undercoat
Color	White, cream, with possible badger markings	White with sable, merle, or tricolor patches	Sable, tricolor, blue merle with white
Shedding Level	Heavy (9/10)	Heavy (8/10)	Heavy (8/10)
Seasonal Blowout	Extreme — 2–3 weeks of intense shedding, twice yearly	Heavy — 2–3 weeks, twice yearly	Heavy — 2–3 weeks, twice yearly

Grooming Requirements

Plan for the following grooming routine regardless of which parent the coat favors:

• Brushing: Minimum 3–4 times per week with a slicker brush and undercoat rake. Daily during seasonal blowouts.
• Professional grooming: Every 8–12 weeks for sanitary trims, nail care, and thorough de-shedding. Budget $60–$120 per session depending on coat condition and your region.
• Bathing: Every 6–8 weeks, or as needed. Double coats take 45–90 minutes to fully dry with a high-velocity dryer — air-drying a thick Pyr-Collie coat can lead to hot spots and fungal skin infections.
• Matting risk: High, especially behind the ears, under the front legs, and around the hindquarters. Mats left untreated can pull on skin and create painful sores.

Important: Never shave a double-coated dog. The undercoat provides insulation against both heat and cold, and shaving disrupts the coat's natural regrowth cycle. According to the AKC's grooming guidance, shaved double coats may grow back patchy, brittle, or not at all.

Health Considerations: Hybrid Vigor vs. Inherited Risks

One of the most persistent myths about designer mixes is that "hybrid vigor" eliminates health problems. Here's the reality: crossbreeding can reduce the risk of recessive genetic conditions that are concentrated within a single breed's gene pool — but it does not protect against conditions that both parent breeds share.

The Great Pyrenees and the Collie overlap on several health risks, which means a Pyrenees Collie mix remains susceptible to the following:

Shared Health Risks (Both Breeds)

• Hip dysplasia: Prevalence in Great Pyrenees is estimated at 15–20% based on Orthopedic Foundation for Animals (OFA) data; Collies also carry significant risk. This is a developmental malformation of the hip joint that can lead to arthritis and mobility loss.
• Elbow dysplasia: More common in the Pyr side but present in Collies as well.
• Bloat (Gastric Dilatation-Volvulus): Both breeds are deep-chested, placing them at elevated risk for this life-threatening emergency. Learn the signs — unproductive retching, distended abdomen, restlessness — and discuss prophylactic gastropexy with your veterinarian if your dog is in the upper weight range.

Great Pyrenees-Specific Conditions That May Appear

• Osteosarcoma (bone cancer): Large and giant breeds carry higher incidence. Often presents as a limp or swelling on a limb.
• Addison's disease: Adrenal insufficiency; symptoms include lethargy, vomiting, weight loss, and increased thirst.

Collie-Specific Conditions That May Appear

• Collie Eye Anomaly (CEA): A congenital eye defect ranging from mild to blindness-causing. DNA testing is available and should be performed on both parent dogs before breeding.
• MDR1 gene mutation: Affects drug sensitivity — dogs with this mutation can have severe reactions to common medications including ivermectin, loperamide (Imodium), and certain sedatives. The Merck Veterinary Manual notes that roughly 70% of Collies carry at least one copy of this mutation. Ask your vet about MDR1 testing before any surgical procedure.
• Dermatomyositis: An inflammatory skin and muscle disease, primarily seen in Collies and Shelties.

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

This is not a beginner dog. The combination of guardian instinct, herding drive, high intelligence, and large size creates a companion that thrives in specific environments and struggles in others.

This Mix Suits You If:

• You have prior experience with large working breeds (livestock guardians, herding dogs, or both).
• You live in a home with a securely fenced yard — minimum 5–6 feet, as both breeds can be climbers and jumpers.
• You're home most of the time or can arrange midday company. Both breeds are prone to separation distress when isolated for long hours.
• You have the time and budget for serious grooming (3–4 hours/week of brushing plus professional sessions).
• Your family includes older children (8+) who understand how to interact calmly with a large dog.
• You're prepared for nighttime barking and can manage it with indoor sleeping arrangements rather than leaving the dog outside.

This Mix May Not Be Right If:

• You're a first-time dog owner — the training demands of this cross are substantial.
• You live in an apartment or attached housing where barking will disturb neighbors.
• You have toddlers or very small children — the herding instinct can manifest as nipping, and a 90-pound dog can accidentally knock over a small child.
• You travel frequently and need to board the dog — both breeds can be stressed by kennel environments.
• You want a low-maintenance coat. There is no version of this mix that is easy to groom.

Cost: Pricing, Budgeting, and Where to Find One

Purchase Price from a Breeder

Because the Great Pyrenees mixed with Collie is not a mainstream designer breed (there's no "brand premium" like you'd see with a Labradoodle), pricing tends to be moderate:

• F1 from a hobby breeder: $500–$1,200
• F1 from a breeder with full health testing on both parents: $1,200–$2,500
• F1B or multigen (rare): $1,500–$3,000

Prices vary by region, with breeders in the Pacific Northwest, Mountain West, and rural Midwest most likely to produce this cross (areas where both working breeds are popular).

Rescue and Adoption

Great Pyrenees and Collie mixes appear regularly in breed-specific rescues and general shelters, particularly in regions with large ranching communities. Adoption fees typically range from $150–$400 and often include spay/neuter, initial vaccinations, and microchipping. Check organizations like the Great Pyrenees Rescue network and Collie rescue groups, as well as general platforms like Petfinder.

Annual Cost of Ownership

Estimated Annual Costs: Great Pyrenees Collie Mix

Expense Category	Low Estimate	High Estimate
Food (large-breed formula, 40–50 lb bags)	$600	$1,100
Professional grooming (4–6 sessions/year)	$300	$720
Veterinary care (wellness + preventives)	$500	$900
Pet insurance (accident + illness)	$600	$1,200
Supplies, toys, training	$200	$500
Total Annual	$2,200	$4,420

First-year costs will be higher — add $500–$1,000 for initial veterinary setup (vaccinations, spay/neuter, microchip, baseline health screening) and $200–$400 for crate, bed, leashes, and grooming tools.

Frequently Asked Questions

What two breeds make up the Great Pyrenees Collie mix?

This cross combines the Great Pyrenees (a French/Spanish livestock guardian breed) with the Collie — most commonly the Rough Collie (the Scottish herding breed recognizable as the "Lassie" dog). Some crosses may use the Smooth Collie, which has a shorter coat but the same temperament and health profile.

Is a Great Pyrenees mixed with Collie hypoallergenic?

No. Neither parent breed is low-shedding or hypoallergenic. This mix inherits a dense double coat that sheds heavily year-round and blows its undercoat seasonally. People with dog allergies should not choose this cross.

How big will a Great Pyrenees Collie mix get?

Most adults fall between 70–95 lb (32–43 kg) and stand 25–29 inches (64–74 cm) at the shoulder, but individuals can range from 55 lb to over 110 lb depending on which parent's genes dominate. Males trend larger.

What health issues might this mix inherit?

Key concerns include hip dysplasia, elbow dysplasia, bloat (GDV), Collie Eye Anomaly, MDR1 drug sensitivity, osteosarcoma, and Addison's disease. Health testing of both parent dogs — including OFA hips/elbows, CERF eyes, and MDR1 DNA — significantly reduces (but does not eliminate) risk.

How much does a Great Pyrenees mixed with Collie cost?

From a breeder, expect to pay $500–$2,500 for an F1 puppy, depending on health testing and breeder reputation. Rescue adoption fees are typically $150–$400. Annual ownership costs run $2,200–$4,400+ including food, grooming, veterinary care, and insurance.

Are Great Pyrenees Collie mixes good with children?

They can be excellent with older children (8+) who understand calm, respectful dog interaction. However, the herding instinct may cause nipping at running children, and the dog's large size creates accidental knock-over risk for toddlers. Supervised interaction and positive reinforcement training are essential.

Do they bark a lot?

Yes. The Great Pyrenees is among the most vocal of all breeds — bred to bark at potential predators, particularly at night. The Collie adds alert-barking tendencies. Expect a dog that vocalizes at unfamiliar sounds, visitors, and nighttime activity. Management (indoor sleeping, white noise, positive reinforcement of quiet behavior) is more realistic than elimination of barking.