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Soft Coated Wheaten Terrier

Lifespan
13.7 years
95% CI 13.2 to 14.4 · McMillan 2024, n=620
Most carried variant
Degenerative Myelopathy
21% of 607 tested · Donner 2023
Behind this page
16 dogs
in the atlas · an early sketch · 607 tested for variants
Also carried:Protein Losing Nephropathy · 18%Microphthalmia · 3.8%

Soft Coated Wheaten Terriers have a cited life expectancy of 13.7 years (McMillan 2024 / VetCompass, n=620, 95% CI 13.2 to 14.4). The most carried tested variant is Degenerative Myelopathy, in 21% of 607 Soft Coated Wheaten Terriers tested (Donner 2023), then Protein Losing Nephropathy (18%) and Microphthalmia (3.8%). Only 16 dogs stand behind the atlas figures here, so little is known yet.

Soft Coated Wheaten Terrier
Photo: Terrierkännaren · CC BY-SA 3.0 · Wikimedia

Also known as Wheaten and Wheatie.

See in the atlas → From CanVAS
Mendelian-disease genetics

What genetic diseases do Soft Coated Wheaten Terriers carry?

From a panel of 250 Mendelian-disease variants screened in 1,054,293 dogs (Donner et al. 2023), Soft Coated Wheaten Terriers carry 8 of them at observable frequency. Carrier frequency is not clinical risk. Most recessive variants require two copies for disease expression; many dominant variants show incomplete penetrance. Read this as a population fingerprint of what's in the gene pool, not a per-dog prediction.

Degenerative Myelopathy (DM)
Autosomal recessive (Incomplete penetrance)
high 21.1%
n = 607 dogs · 1 variant tested · OMIA:000263-9615 · omia.org →
SOD1what this gene does

SOD1 is a gene that helps protect cells from damage caused by harmful molecules called free radicals.

For your dog: If your dog is a carrier of SOD1 variants, it's worth discussing with your vet, but remember carrier status doesn't mean your dog will get the disease.

Protein Losing Nephropathy (PLN; NPHS1-related)
Autosomal recessive (Incomplete penetrance)
moderate 18.0%
n = 607 dogs · 1 variant tested · OMIA:001326-9615 · omia.org →
NPHS1what this gene does

NPHS1 is a gene important for kidney function, helping to keep proteins in the blood where they belong.

For your dog: If your dog’s breed is on the list, it’s worth asking your vet about NPHS1 to understand any risks and keep an eye on kidney health.

Cystinuria Type I-B (SLC7A9 p.A217T)
Autosomal recessive (Incomplete penetrance)
marker disputed 6.8%
n = 607 dogs · 2 variants tested · OMIA:001880-9615 · omia.org →
SLC7A9what this gene does

SLC7A9 is a gene that helps transport certain amino acids in the kidneys. It plays a role in how the body handles cystine, an amino acid that can form crystals.

For your dog: If your dog is a carrier, it’s worth discussing with your vet to monitor urinary health and catch any issues early.

Microphthalmia (Discovered in the Soft-Coated Wheaten Terrier)
Autosomal recessive
low 3.8%
n = 607 dogs · 1 variant tested · OMIA:002151-9615 · omia.org →
Paroxysmal Dyskinesia (Discovered in the Irish Soft Coated Wheaten Terrier; PIGN-related; PxD)
Autosomal recessive
low 3.1%
n = 606 dogs · 1 variant tested · OMIA:002084-9615 · omia.org →
Cystinuria Type I-A (SLC3A1 p.I192V)
Autosomal recessive
low 0.49%
n = 607 dogs · 3 variants tested · OMIA:000256-9615 · omia.org →
SLC3A1what this gene does

SLC3A1 is a gene that helps transport certain amino acids in the kidneys. It plays a key role in preventing the buildup of cystine, which can form stones.

For your dog: If your dog is from a breed known to carry SLC3A1 variants, it’s worth discussing cystinuria risks with your vet, especially if urinary issues arise.

Cone-Rod Dystrophy (cord1-PRA/crd4)
Autosomal recessive (Incomplete penetrance)
low 0.41%
n = 605 dogs · 1 variant tested · OMIA:001432-9615 · omia.org →
RPGRIP1what this gene does

RPGRIP1 is a gene involved in the function of photoreceptor cells in the eye, which help dogs see in different light conditions.

For your dog: If your dog belongs to a breed known to carry RPGRIP1 mutations, it’s worth discussing with your vet to understand the risks and monitor eye health.

Progressive Rod-Cone Degeneration (prcd-PRA)
Autosomal recessive
low <0.1%
n = 605 dogs · 1 variant tested · OMIA:001298-9615 · omia.org →
PRCDwhat this gene does

PRCD is a gene involved in the health of a dog's retina, the part of the eye that detects light and helps with vision.

For your dog: If your dog belongs to a breed known to carry PRCD changes, it's worth discussing eye health and potential genetic testing with your vet.

Source: Donner J et al. 2023. Genetic prevalence and clinical relevance of canine Mendelian disease variants in over one million dogs. PLOS Genetics 19(2):e1010651 · Evidence: Limited (DTC ascertainment, tag-SNP proxy) · Confounding MEDIUM · License CC-BY-4.0 · Phene IDs from OMIA (Sydney School of Veterinary Science, The University of Sydney; DOI 10.25910/2AMR-PV70).
Sample size in this breed: 607 dogs from the Donner 2023 cohort.
In plain terms

What these results mean for a Soft Coated Wheaten Terrier

Degenerative myelopathy (DM)

21.1% of Soft Coated Wheaten Terriers in the Donner 2023 cohort carried it (n=607).

  • DM is a loss of function in the spinal cord that begins in adulthood and progresses to paralysis of the back legs. There is no treatment that stops it.
    OMIA 000263-9615

    “This is an adult onset degeneration of the spinal cord that progresses to paraplegia and tetraparesis. There is no successful treatment. A genetic test is available.” OMIA 000263-9615

  • Two copies of the SOD1 variant mean at risk, not affected. Some dogs with two copies never show signs.
    OMIA 000263-9615

    “some homozygous mutant dogs had no signs of degenerative myelopathy, which suggests incomplete penetrance or other causative loci” OMIA 000263-9615

  • One copy makes a dog a carrier. In the study that found the variant, every affected dog tested had two copies.
    OMIA 000263-9615

    “All affected dogs tested were homozygous mutant.” OMIA 000263-9615

What to do
A DNA result is not a diagnosis. Take the result, and any change in how the dog walks, to a veterinarian.

No test, or a mix
Without a test nobody can say how many copies a dog has. A breed's carrier frequency describes the breed, not this dog.

SLC7A9 p.A217T (sold as a cystinuria test)

Marker disputed

6.8% of Soft Coated Wheaten Terriers in the Donner 2023 cohort carried it (n=607).

  • The curated record finds no support for this variant causing cystinuria, and the researchers who studied it advise against using it as a test.
    OMIA 001880-9615

    “there appears to be no support for the variant to be causal” OMIA 001880-9615

    “strongly recommend not to use "the variant in SLC7A9 as a test to predict the risk of developing cystinuria in male English bulldogs.” OMIA 001880-9615

What to do
A carrier result for this variant does not predict bladder stones. Straining to urinate or blood in the urine is a reason to see a veterinarian whatever a DNA test says.

No test, or a mix
The curated record gives no reason to test for this variant.

Which Mendelian variants matter most for Soft Coated Wheaten Terriers?

The Mendelian-disease table above lists 8 variants at observable carrier frequency among 194 screened in 607 Soft Coated Wheaten Terriers (Donner 2023). Two matter most by frequency and impact; four others are worth knowing.

Protein losing nephropathy in Soft Coated Wheaten Terriers is a kidney disease linked to two variants inherited together, one in NPHS1 and one in KIRREL2 (Littman 2013). Which of the two causes the disease has not been settled, and risk concentrates in dogs that carry two copies. Affected dogs lose protein in the urine, leading to edema, ascites, and progressive renal failure. 18.0% of Wheaten Terriers in the Donner cohort carry the variant (n=607).

Not every dog with two copies becomes clinically affected. Diagnosis is by urinalysis and kidney imaging. Affected dogs are managed with diet (reduced protein, low sodium) and monitoring for progression. Testing is available.

Microphthalmia and Paroxysmal Dyskinesia

Microphthalmia in Soft Coated Wheaten Terriers is a recessive eye condition causing underdevelopment of one or both eyes. 3.8% carry the variant (n=607). Paroxysmal dyskinesia is a recessive neuromuscular condition causing episodes of involuntary movement or stiffness. 3.1% carry the variant (n=606). Both are rare in homozygous state. Testing is available for breeding decisions.

What should I feed a Soft Coated Wheaten Terrier?

Feeding a Wheaten Terrier well means accounting for the breed’s protein-losing nephropathy risk and managing weight appropriately for a compact, muscular terrier. The 18% carrier frequency for NPHS1-related PLN shapes the nutritional priorities most directly.

Protein management is breed-specific. A healthy Wheaten Terrier without clinical kidney disease should eat a moderate-protein (18 to 22% on a dry-matter basis) complete and balanced adult formula. The breed is prone to weight gain if overfed, which compounds kidney stress. Research on NPHS1-related PLN in Soft Coated Wheaten Terriers has not yet identified a preventive diet, but protein restriction is standard practice once clinical disease emerges.

Joint care is straightforward because hip dysplasia is not a major breed concern. Wheaten Terriers are a medium-sized breed not documented among the high-prevalence hip dysplasia breeds in OFA statistics (ofa.org/diseases/hip-dysplasia/statistics/) and do not require the specialized puppy formulations that giant breeds do. A standard large-breed puppy formula with controlled calcium (0.8 to 1.6% on a dry-matter basis) is appropriate during growth.

Feeding schedules matter for metabolic health. Wheaten Terriers are food-motivated and prone to obesity. Two meals per day on a measured portion appropriate to activity level is the standard. Unlike scent hounds bred for long-range hunting, Wheaten Terriers are compact terriers with moderate energy demands. A typical adult Wheaten in the 30 to 45 lb range needs roughly 900 to 1,200 kilocalories per day at maintenance, depending on age and activity level (NRC 2006). Weight trending upward is the first sign to reduce portion size.

Grain-free diets carry no specific signal in this breed. Wheaten Terriers are not among the breeds over-represented in FDA reports of diet-associated dilated cardiomyopathy (FDA 2019 advisory, fda.gov). A grain-inclusive or grain-free formula is acceptable if it is complete and balanced, taurine-supplemented, and tested in feeding trials by the manufacturer.

What we don’t know

The penetrance of both DM and PLN in Soft Coated Wheaten Terriers remains incompletely characterized. We do not yet know which dogs carrying the DM variant (21.1% of the cohort) or the PLN variant (18.0% of the cohort) will develop clinical signs and which will remain asymptomatic for life. The breed’s small atlas sample (n=16 dogs) limits our ability to identify longevity outliers or environmental modifiers that might inform that distinction.

Environmental and dietary factors in PLN progression have not been systematically studied in Wheaten Terriers specifically. The honest summary is that clinical management is based on general kidney-disease principles rather than breed-specific evidence.

Frequently asked questions about Soft Coated Wheaten Terriers

What is the most common genetic disease in Soft Coated Wheaten Terriers? Degenerative myelopathy (DM), with 21.1% carrier frequency in the Donner cohort (Donner 2023, n=607). Protein losing nephropathy is close behind at 18.0% carrier frequency (Donner 2023, n=607). Both are inherited as autosomal recessives with incomplete penetrance.

Are Soft Coated Wheaten Terriers prone to kidney disease? Protein losing nephropathy is a breed concern, with 18.0% of Wheaten Terriers carrying the NPHS1 variant (Donner 2023, n=607). Not every dog with two copies becomes affected, and the breed club recommends screening breeding stock.

What is degenerative myelopathy and when does it show up? Degenerative myelopathy is a progressive spinal-cord disease that causes hind-limb weakness and eventually paralysis. It typically emerges in middle age to senior years. The condition is incurable. Genetic testing can identify carriers.

Should I do a DNA test on my Soft Coated Wheaten Terrier? For breeding stock, yes. The Soft Coated Wheaten Terrier Club of America recommends testing for DM, PLN, and cystinuria variants before breeding. For pet dogs, testing informs you of carrier status but does not change management unless clinical signs emerge.

How long do Soft Coated Wheaten Terriers live? The breed median lifespan is commonly cited as approximately 12 to 14 years by the Soft Coated Wheaten Terrier Club of America (scwtca.org). Individual longevity varies with genetics, early-life care, weight management, and screening for breed-typical conditions like kidney disease.

What should I feed a Soft Coated Wheaten Terrier? A moderate-protein (18 to 22% dry-matter basis), complete-and-balanced adult formula is appropriate for healthy adults. Portion control is essential because the breed is food-motivated and prone to weight gain. Dogs with clinical kidney disease should transition to a lower-protein, low-sodium therapeutic diet under veterinary guidance.

Are Soft Coated Wheaten Terriers good with children? Yes. The breed was developed as a working farm terrier and is known for loyalty to family. Supervision with very small children is standard practice, as with any terrier.

Do Soft Coated Wheaten Terriers have ear infections? Ear infections are not documented as a major breed concern. Ear infections are not documented as a major breed concern for Soft Coated Wheaten Terriers, and the breed is not among those flagged in OFA health surveys for chronic otitis.

Names & origins

Other names

The Soft Coated Wheaten Terrier is also recorded as Wheaten and Wheatie.

Identified as Soft Coated Wheaten Terrier (VBO:0201260) in the Vertebrate Breed Ontology (Mullen et al. 2025, CC-BY 4.0) · registry IDs iDog 228 · VeNom 22411.

For researchers Population genetics, disease models and every recorded condition Open the research detail for the Soft Coated Wheaten Terrier
What the atlas says about Soft Coated Wheaten Terrier

In the atlas, the Soft Coated Wheaten Terrier clusters consistently as Soft Coated Wheaten Terrier (100% of the 16 dogs here). Dogs here sit in a relatively sparse region of the atlas, fewer close neighbors than typical.

Only 16 dogs of this breed in the atlas, modestly sampled.

Genetic dimensions · CanVAS atlas

What the atlas genotypes say about Soft Coated Wheaten Terrier

Computed from the 14,478 CanVAS dogs in the Atlas, on an imputed genotype backbone: 77,215 directly typed sites per dog, imputed to 9.67 million variants.

The confidence below counts dogs, not reads: it is the size of the sample, and it is separate from how the genotypes were measured.

These figures are computed from only 16 Soft Coated Wheaten Terriers in the atlas. Treat them as provisional. They sharpen as more dogs are added.
Dogs in the Atlas
16Founders
10 from Hayward2016, 4 from Spatola, 2 from JenkinsWGS
Genetic diversity

Not enough dogs in the atlas yet (n=16) for a reliable diversity figure. It fills in as more are added.

Mean heterozygosity across the breed. Too few dogs in this breed (<20) to rank.
What does genetic diversity mean?

How varied a breed's gene pool is — the share of gene spots where a typical dog of the breed carries two different versions rather than two identical ones.

How to read it: Higher = more diverse. Among well-sampled breeds it ranges roughly 0.22 (least diverse) to 0.33 (most diverse).

Diversity is a strength, not a verdict on any individual dog. Lower diversity means it's worth paying attention to recessive-risk testing — not that a dog is doomed.

Cluster structure

Not enough dogs in the atlas yet (n=16) to resolve cluster structure. It fills in as more are added.

What does within-breed variation mean?

How much individual dogs within the breed differ from each other genetically.

How to read it: Higher = more internal variety among individuals of the breed.

Sensitive to how many dogs of the breed we've sampled.

Related breeds
In the Terrier group
Explore the full lineage map →
VBO foundation stock (breeding records) · AKC breed group
Relatedness is documented lineage + kennel family. Genetic-ancestry distance measures diversity, not kinship, so it isn't used here.
How long they live
13.7years (life expectancy)
95% CI 13.2–14.4 · VetCompass, McMillan 2024, n=620. source
What does typical lifespan mean?

The median age dogs of the breed tend to reach.

How to read it: Higher = longer-lived. Compare to longevity-for-size to see whether it's just a size effect.

Drawn from population lifespan records; individual dogs vary widely with care, genetics, and luck.

n = 16 dogs · low sample · CanVAS (Brundage 2026) · Sniff Atlas
A gift to human medicine

Soft Coated Wheaten Terriers are a natural model for human disease

Because the same genes cause the same conditions across species, the inherited conditions documented in Soft Coated Wheaten Terriers help researchers understand, and work toward treating, the human diseases they model. This is the dog advancing human medicine. The breed models the human disease; it does not have it, and this is not a prediction for your dog.

Human equivalents via OMIA → Mondo / OMIM. Model-of, not identity. The named gene is the canine locus, not a claim that a pet has the human disease.
Documented in OMIA

Every condition recorded in the Soft Coated Wheaten Terrier

Beyond the testable carriers above, OMIA's literature catalogue records 5 genetic conditions in the Soft Coated Wheaten Terrier, 4 of which have a known human equivalent. This is the documented landscape across all Soft Coated Wheaten Terriers ever studied, not a prediction for any one dog.

Online Mendelian Inheritance in Animals (OMIA); Nicholas, Tammen & Sydney Informatics Hub, DOI 10.25910/2AMR-PV70
Documented in the breed's literature is not carrier status and not a forecast for an individual dog. Human equivalents are mapped via Mondo/OMIM. Carrier frequencies (above) are the separately-measured testable subset (Donner 2023).
The data behind this page

Where every number on this page came from.

This page draws on three primary data sources. Carrier frequencies for the Mendelian section come from Donner et al. 2023 (CC-BY-4.0). We grade these data at evidence Limited because the cohort is a direct-to-consumer ascertainment, which biases toward owners who chose to test their dogs. The panel also uses tag-SNP proxies for some variants rather than direct causal-variant assays. Limited is a study-design grade, not a quality grade: the Donner cohort is the largest open canine-genotype dataset in existence and we are grateful for it. We rate the confounding MEDIUM.

Population-genetic dimensions (heterozygosity, intra-breed PCA distance, nearest neighbors, trait-locus frequencies) come from CanVAS (Brundage 2026), harmonized through the Sniff Atlas. The exact release date and verification commit are pinned at the bottom of the page so a researcher can trace a number back to a specific snapshot. The disease-gene-variant graph comes from OMIA (Online Mendelian Inheritance in Animals; Nicholas, Tammen, and the Sydney Informatics Hub at the Sydney School of Veterinary Science, The University of Sydney; retrieved April 2026, DOI 10.25910/2AMR-PV70).

What this page does not yet have. Inheritance modes and per-disease penetrance evidence from Donner 2023 are in the structured data for every variant the panel covers. Mondo, OMIM, Ensembl, and HGNC cross-references live on the gene and disease pages this page links to, rather than being repeated here. What is still absent from this breed page is anything not in the cited panel, and each such gap carries its cause where it appears.

How to cite this page. The computed dimensions on this page are derived from the open Sniff Atlas v1.0.1 (Gehring 2026, doi:10.5281/zenodo.20566358, CC-BY 4.0). Full citation formats including BibTeX, RIS, and CITATION.cff at sniff.world/cite.

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References
  1. Donner J, Freyer J, Davison S, Anderson H, Blades M, Honkanen L, et al. (2023). Genetic prevalence and clinical relevance of canine Mendelian disease variants in over one million dogs. PLOS Genetics 19(2):e1010651. doi:10.1371/journal.pgen.1010651
  2. Brundage DM (2026). CanVAS: A Harmonized and Imputed Canine Variant Atlas. bioRxiv. doi:10.64898/2026.04.13.718238
  3. Nicholas, F.W., Tammen, I., & Sydney Informatics Hub. (2026). Online Mendelian Inheritance in Animals (OMIA) [dataset]. The University of Sydney. https://omia.org. doi:10.25910/2AMR-PV70 (retrieved April 2026).
Last updated
Sources: CanVAS (Brundage 2026) · Donner 2023 · OMIA