Long Haired Alsatian Dog: The Science Behind the Recessive Coat Gene
Discover the genetics, evolution, and care science behind the long haired Alsatian dog. Learn why this recessive coat occurs and what it means for owners.
What Is a Long Haired Alsatian Dog?
A long haired Alsatian dog (German Shepherd) carries two copies of a recessive variant in the FGF5 gene (fibroblast growth factor 5), which extends the anagen (growth) phase of the hair cycle, producing a coat that exceeds 5 cm (2 inches) in length with no dense undercoat or a significantly reduced one. This is not a separate breed — it is a coat-length variation within the standard German Shepherd Dog (GSD). The trait appears in roughly 1 in 10 to 1 in 15 GSDs depending on lineage, though exact prevalence varies by breeding population. Long-coated GSDs were historically culled from conformation shows but gained full FCI recognition in 2011 under the "Langstockhaar" (long stock hair) variety.
The Genetics: How the FGF5 Gene Creates Long Coats
Gene Mechanism
The FGF5 gene, located on canine chromosome 32, encodes a signaling protein that regulates the transition from the anagen (active growth) phase to the catagen (regression) phase in hair follicles. A specific single nucleotide polymorphism (SNP) — a substitution at position c.286G>T — produces a truncated, non-functional FGF5 protein. Without functional FGF5 signaling, follicles remain in anagen longer, allowing hair shafts to grow significantly before shedding.
Because this variant is autosomal recessive, a dog must inherit one copy from each parent (genotype L/L) to express a long coat. Dogs with one copy (S/L, where S = short/stock coat) appear phenotypically normal but are carriers. Two carrier parents produce, on average:
- 25% long-coated puppies (L/L)
- 50% carrier, short-coated puppies (S/L)
- 25% non-carrier, short-coated puppies (S/S)
A 2007 study published in Science by Cadieu et al. identified FGF5 as one of three genes responsible for coat length variation across domestic dog breeds. The research, which analyzed 80 dog breeds, confirmed that the same FGF5 variant recurs across unrelated breeds — a case of convergent selection or shared ancestral polymorphism.
| Parent 1 | Parent 2 | Possible Offspring | Long Coat Probability |
|---|---|---|---|
| Short coat (S/S) | Short coat (S/S) | All S/S short coat | 0% |
| Short coat carrier (S/L) | Short coat carrier (S/L) | Mix of S/S, S/L, L/L | 25% |
| Short coat carrier (S/L) | Long coat (L/L) | Mix of S/L, L/L | 50% |
| Long coat (L/L) | Long coat (L/L) | All L/L long coat | 100% |
DNA tests from labs such as Animal Genetics or Embark can confirm carrier status for approximately $75–$175 per test, depending on the panel selected. Responsible breeders test both parents before planned matings to predict coat outcomes.
Evolutionary Context: Why Long Coats Persisted in Working Dogs
From Wolves to Herding Lines
The ancestral gray wolf (Canis lupus) possesses a double coat with a short, dense undercoat and longer guard hairs — an adaptation for thermoregulation across Eurasian climates. Early domestic dogs largely retained this structure. The FGF5 long-hair mutation likely arose as a spontaneous polymorphism thousands of years ago and persisted in herding and working lineages where coat length was not under strong negative selection.
In the herding dogs of southern Germany and Alsace (the region that gave the "Alsatian" its alternate name), long-coated individuals appeared regularly in litters. These dogs worked in varied terrain — from the cold Bavarian highlands to warmer lowland pastures — and the long coat provided adequate protection without the insulating undercoat in moderate climates. Captain Max von Stephanitin, who founded the modern GSD breed in 1899, initially accepted long-coated dogs in the breed registry but later excluded them from conformation standards, favoring the stock coat for uniformity. The long coat gene was never eliminated from the gene pool because carriers (S/L) were continually bred.
The persistence of this recessive trait illustrates a key principle in canine genetics: recessive alleles can remain hidden for generations, surfacing only when two carriers are mated. This is why two stock-coated GSD parents can produce a long haired Alsatian dog puppy — a scenario that surprises many first-time breeders.
Physiology: How the Long Coat Affects Thermoregulation and Skin Health
Understanding the physiological differences between stock-coated and long-coated GSDs is essential for proper care. The distinctions go beyond aesthetics:
| Feature | Stock Coat (Standard GSD) | Long Coat (Langstockhaar) |
|---|---|---|
| Guard hair length | 2.5–5 cm (1–2 in) | 5–12+ cm (2–5+ in) |
| Undercoat density | Thick, woolly, full coverage | Sparse to absent; some individuals have moderate undercoat |
| Shedding pattern | Heavy seasonal blow (spring/fall); moderate year-round | Moderate, more consistent year-round; less dramatic seasonal blow |
| Cold tolerance | Excellent down to approximately -10°C (14°F) for active dogs | Good in dry cold; reduced in wet/windy conditions due to lack of undercoat insulation |
| Heat tolerance | Moderate; undercoat traps heat in summer | Slightly better; less insulating undercoat allows more convective cooling |
| Skin ventilation | Reduced; higher humidity at skin surface | Better airflow to skin in dry conditions; trapping moisture in wet conditions |
| Matting risk | Low with regular brushing | High behind ears, under legs, around hindquarters; requires brushing 3–5× per week |
The key physiological insight: the long coat's lack of a dense undercoat means it does not insulate as effectively in extreme cold or wet conditions. The guard hairs repel water and debris but do not trap a warm air layer the way the stock coat's undercoat does. This is why long haired Alsatian dogs in northern US climates (Minnesota, Maine, Montana) may need a waterproof insulated coat for extended outdoor activity below -5°C (23°F). Brands like Ruffwear (Powell Jacket, ~$90–$110) or Hurtta (Expedition Parka, ~$80–$100) offer appropriate coverage for large-breed dogs.
Practical Implications: Living With a Long Haired Alsatian Dog
Daily and Seasonal Care Framework
Grooming time commitment: Expect 20–40 minutes per session, 3–5 times weekly, plus a thorough 60-minute session monthly. Use a slicker brush (e.g., Chris Christensen Big G, ~$55–$70) for the topcoat and a wide-toothed undercoat rake for any feathering around the breeches and tail. A high-velocity dryer (such as the MetroVac Air Force Commander, ~$130–$170) significantly reduces drying time after baths and blows out loose hair efficiently.
Bathing frequency: Every 6–10 weeks or as needed. Over-bathing strips natural oils from the longer guard hairs, leading to dryness and brittleness. Use a canine-specific oatmeal or moisturizing shampoo (pH 6.5–7.5, formulated for dogs — human shampoo is too acidic for canine skin).
Exercise requirements: The long coat does not alter the breed's exercise needs. Adult GSDs require 60–120 minutes of structured activity daily, including physical exercise (walking, running, swimming, agility) and mental stimulation (scent work, obedience training, puzzle feeders). The coat type has no bearing on energy level or drive.
Seasonal considerations:
- Summer: Never shave a long coated GSD. The guard hairs protect against UV radiation and help regulate temperature. Provide shade, fresh water, and avoid peak heat (above 27°C / 80°F) for strenuous exercise.
- Winter: Wipe paws and undercarriage after walks on salted surfaces. Check for ice ball formation between paw pads — trim pad hair with blunt-nosed scissors to reduce buildup.
- Spring/Fall: Increase brushing to daily during shedding transitions to prevent mats and reduce household hair accumulation.
Debunking Common Misconceptions About Long Haired Alsatian Dogs
| Myth | Fact |
|---|---|
| "Long coated GSDs are a mixed breed or a different breed." | They are purebred German Shepherds with a homozygous recessive FGF5 genotype. Both the FCI and the UK Kennel Club recognize them as a valid coat variety within the breed standard. |
| "Long haired Alsatian dogs shed less." | They shed differently — less dramatic seasonal blowouts but consistent year-round shedding. Total annual hair volume is comparable. They are not hypoallergenic. |
| "Long coats mean the dog is less healthy or lower quality." | Coat length has no correlation with hip dysplasia, degenerative myelopathy, temperament, or working ability. Health testing (OFA hips/elbows, DM gene test) is equally important regardless of coat type. |
| "They can't handle cold weather at all." | They tolerate dry cold reasonably well. The limitation is in wet, windy cold where the lack of undercoat reduces insulation. A dog coat solves this for extended outings. |
| "The AKC doesn't recognize long coated GSDs." | The AKC breed standard lists long coat as a disqualification in conformation shows, but long coated GSDs can still be AKC-registered and compete in obedience, agility, rally, and other performance events. |
Health Considerations: When Coat Changes Signal a Problem
While the long coat itself is a normal genetic variant, certain coat and skin changes in a long haired Alsatian dog warrant veterinary evaluation:
- Symmetric bilateral hair loss (alopecia): Thinning on both flanks may indicate alopecia X (growth hormone-responsive dermatosis) or Cushing's disease (hyperadrenocorticism). GSDs are among breeds with higher reported incidence of adrenal sex hormone imbalances.
- Chronic ear infections: The long hair around and inside the ear pinnae reduces airflow, increasing humidity in the ear canal. Recurrent otitis externa (2+ episodes per year) should prompt a veterinary dermatology referral. Treatment costs range from $150–$400 per episode for cytology, culture, and medicated drops.
- Hot spots (acute moist dermatitis): Long coats trap moisture against the skin, especially in humid climates or after swimming. Hot spots appear as rapidly expanding, red, weeping lesions — often within 24 hours of initial irritation. Veterinary treatment typically involves clipping, topical antiseptics, and sometimes oral antibiotics ($80–$200 per visit).
- Dull, dry, brittle coat: May indicate hypothyroidism, nutritional deficiency (particularly zinc or essential fatty acids), or systemic illness. A veterinary workup including a thyroid panel ($60–$120) and dietary review is recommended.
- Excessive scratching or licking: Could signal atopic dermatitis, flea allergy dermatitis, or food sensitivities. GSDs have a documented predisposition to atopy, with onset typically between 1–3 years of age.
When to see the vet: If your long haired Alsatian dog develops sudden patchy hair loss, persistent skin redness, foul odor from the coat or ears, or behavioral changes like excessive licking of one area, schedule a veterinary appointment within 48 hours. These are not normal coat variation signs — they indicate underlying pathology that requires diagnosis and treatment.
How Is This Different From Humans? Hair Growth Cycle Comparison
The reason your long haired Alsatian dog's coat grows to a certain length and then stops — unlike human scalp hair, which can grow for years — comes down to the anagen phase duration:
- Human scalp hair: Anagen phase lasts 2–7 years, allowing hair to grow 60–100+ cm before cycling.
- Dog guard hairs (long coat): Anagen phase lasts approximately several months to over a year, depending on the FGF5 genotype. The extended anagen in L/L dogs allows guard hairs to reach 5–12+ cm before entering catagen and telogen (resting/shedding) phases.
- Dog undercoat: Much shorter anagen cycle, synchronized with photoperiod (daylight hours), which drives seasonal shedding. Long-coated dogs with minimal undercoat have fewer follicles cycling in this synchronized pattern.
This is also why dogs don't need haircuts the way humans do — their hair growth is self-limiting. The long coat reaches its genetically determined maximum length and then sheds and regrows in cycles. However, the feathering on the legs, tail, and behind the ears of a long haired Alsatian dog can become tangled or collect debris, making regular trimming in these areas a practical necessity even though it's not biologically required.
Frequently Asked Questions
Why do some German Shepherds have long hair?
They inherit two copies of a recessive FGF5 gene variant — one from each parent. This variant extends the hair growth phase, producing longer guard hairs and typically a reduced undercoat. It's a naturally occurring mutation within the breed, not a sign of crossbreeding.
Can long haired Alsatian dogs compete in dog shows?
Under the FCI (international) standard since 2011, yes — they compete in the Langstockhaar variety. Under the AKC standard (United States), the long coat is a disqualification in conformation, but these dogs can compete in all AKC performance events including agility, obedience, tracking, and herding trials.
Is a long coat a sign of health problems?
No. The FGF5 variant affects only coat length. Long coated GSDs have the same breed-typical health risks as stock coated GSDs: hip dysplasia (estimated 19–20% prevalence per OFA data), elbow dysplasia, degenerative myelopathy, and gastric dilatation-volvulus (bloat). Responsible breeding practices and health screening apply equally.
How much does a long haired Alsatian dog cost?
Prices vary widely. From a responsible breeder with health-tested parents (OFA hips/elbows, DM clear), expect $1,500–$3,500 in the US. Long coated puppies from working-line breeders may be priced lower ($1,000–$2,000) since they cannot compete in AKC conformation. Adoption through GSD rescue organizations typically costs $200–$500. Be cautious of breeders marketing "rare long coat" puppies at premium prices without health testing documentation.
Do long haired GSDs need professional grooming?
Most owners can manage grooming at home with proper tools. However, a professional groomer session every 8–12 weeks ($50–$90 per visit for a large breed) is helpful for sanitary trims, nail grinding, ear cleaning, and thorough deshedding treatments. Dogs prone to matting benefit from professional attention more frequently.
Is the long coat normal for the breed?
Yes. It has existed within the GSD gene pool since the breed's founding in the late 19th century and likely predates it in ancestral herding dogs. The FCI, the UK Kennel Club, and numerous national breed clubs now formally recognize it. While it remains a disqualification in AKC conformation, it is a genetically normal and well-understood trait.
Sources & Further Reading
- Cadieu, E. et al. (2009). "Genes controlling coat length and texture in domestic dogs." Science, 326(5959), p. 1506. — Identified FGF5, RSPO2, and KRT71 as the three primary coat-determining genes.
- FCI Breed Standard No. 166: German Shepherd Dog — Includes Langstockhaar variety recognition.
- AKC German Shepherd Dog Breed Standard — US conformation standard and performance event eligibility.
- Orthopedic Foundation for Animals (OFA) — Breed-specific health screening data for German Shepherd Dogs.
Jonas Cole
All our authors care for dogs every day — read more of their work on the authors page.
