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Pomeranian

Lifespan
12.2 years
95% CI 12 to 12.5 · McMillan 2024, n=2,941
Most carried variant
Degenerative Myelopathy
9% of 5,294 tested · Donner 2023
Behind this page
26 dogs
in the atlas · an early sketch · 5,294 tested for variants
Also carried:Von Willebrand's Disease, Type 1 · 8.5%Ehlers-Danlos Syndrome · 4.5%

Pomeranians have a cited life expectancy of 12.2 years (McMillan 2024 / VetCompass, n=2,941, 95% CI 12 to 12.5). The most carried tested variant is Degenerative Myelopathy, in 9% of 5,294 Pomeranians tested (Donner 2023), then Von Willebrand's Disease, Type 1 (8.5%) and Ehlers-Danlos Syndrome (4.5%). 26 dogs stand behind the atlas figures here, so treat this page as an early sketch.

Pomeranian
Photo: Blackoranges · Public domain · Wikimedia

Also known as Deutscher Spitz, Pom, Pompom, and Spitz enano.

See in the atlas → From CanVAS
Mendelian-disease genetics

What genetic diseases do Pomeranians carry?

From a panel of 250 Mendelian-disease variants screened in 1,054,293 dogs (Donner et al. 2023), Pomeranians carry 27 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)
low 9.0%
n = 5,294 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.

Von Willebrand's Disease, Type 1 (vWD 1)
Autosomal recessive
low 8.5%
n = 5,294 dogs · 1 variant tested · OMIA:001057-9615 · omia.org →
Ehlers-Danlos Syndrome (Discovered in the Chihuahua and Poodle)
Autosomal recessive
low 4.5%
n = 121 dogs · 1 variant tested · OMIA:002203-9615 · omia.org →
TNXBwhat this gene does

TNXB is a gene that helps produce a protein important for connective tissue, which supports skin, joints, and other structures in the body.

For your dog: If your dog is from a breed known to carry TNXB variants, it's worth discussing with your vet, especially if you notice unusual joint flexibility or skin issues.

Progressive Rod-Cone Degeneration (prcd-PRA)
Autosomal recessive
low 2.1%
n = 5,285 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.

Bald Thigh Syndrome (Discovered in Sighthounds)
Autosomal recessive
low 2.1%
n = 121 dogs · 1 variant tested · OMIA:002168-9615 · omia.org →
IGFBP5what this gene does

IGFBP5 is a gene that helps regulate growth factors involved in tissue development and repair.

For your dog: If you have a sighthound, it’s worth mentioning IGFBP5-related risks to your vet, but being a carrier doesn’t mean your dog will develop the syndrome.

Dilated Cardiomyopathy risk factor (Discovered in the Doberman Pinscher; PDK4-related)
Autosomal dominant (Incomplete penetrance)
marker disputed 1.8%
n = 5,294 dogs · 2 variants tested · OMIA:000162-9615 · omia.org →
PDK4what this gene does

PDK4 helps regulate how cells use energy, especially in the heart muscle.

For your dog: If your dog is one of the breeds known to carry this gene, it’s worth discussing heart health with your vet, but being a carrier doesn’t mean your dog will develop disease.

Progressive Retinal Atrophy (Discovered in the Giant Schnauzer; NECAP1-related)
Autosomal recessive
low 1.6%
n = 5,294 dogs · 1 variant tested · OMIA:002198-9615 · omia.org →
Rod-Cone Dysplasia 3 (Discovered in the Cardigan Welsh Corgi; rcd3)
Autosomal recessive
low 0.87%
n = 5,293 dogs · 1 variant tested · OMIA:001314-9615 · omia.org →
Chondrodystrophy and Intervertebral Disc Disease Risk (CDDY)
Autosomal dominant
low 0.53%
n = 5,268 dogs · 1 variant tested · OMIA:000157-9615 · omia.org →
FGF4what this gene does

FGF4 influences leg length by affecting bone growth, leading to shorter legs in certain breeds.

For your dog: If your dog is from a breed known to carry this gene, it's worth discussing spinal health with your vet, but being a carrier doesn’t guarantee problems.

Canine Multifocal Retinopathy 1 (Discovered in Mastiff-related breeds; CMR1)
Autosomal recessive
low 0.27%
n = 5,294 dogs · 1 variant tested · OMIA:001444-9615 · omia.org →
BEST1what this gene does

BEST1 is a gene that helps maintain the health of the retina, the light-sensitive layer at the back of the eye. It plays a role in keeping the cells in the retina functioning properly.

For your dog: If your dog is from a breed known to carry BEST1 variants, it’s worth discussing retinal health with your vet, especially if you notice any vision changes.

Cone-Rod Dystrophy (cord1-PRA/crd4)
Autosomal recessive (Incomplete penetrance)
low 0.11%
n = 5,284 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.

Hereditary Vitamin D-Resistant Rickets Type II
Autosomal recessive
low 0.10%
n = 5,294 dogs · 1 variant tested · OMIA:001431-9615 · omia.org →
Hyperuricosuria (HUU)
Autosomal recessive
low <0.1%
n = 5,294 dogs · 1 variant tested · OMIA:001033-9615 · omia.org →
SLC2A9what this gene does

SLC2A9 is a gene that helps regulate uric acid levels in a dog's body. It plays a role in how the kidneys handle this substance.

For your dog: If your dog is one of the breeds known to carry this gene variant, it’s worth discussing with your vet to understand any potential urinary health concerns.

Factor VII Deficiency
Autosomal recessive
low <0.1%
n = 5,293 dogs · 1 variant tested · OMIA:000361-9615 · omia.org →
F7what this gene does

The F7 gene helps produce a protein important for blood clotting, which stops bleeding when dogs get injured.

For your dog: If your dog is from a breed known to carry F7 variants, it's worth mentioning to your vet before any surgery or if you notice unusual bleeding.

Cystinuria Type I-B (SLC7A9 p.A217T)
Autosomal recessive (Incomplete penetrance)
marker disputed <0.1%
n = 5,294 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.

Osteochondrodysplasia (Discovered in the Miniature Poodle)
Autosomal recessive
low <0.1%
n = 5,294 dogs · 1 variant tested · OMIA:001400-9615 · omia.org →
SLC13A1what this gene does

SLC13A1 is a gene that helps transport important molecules involved in bone and cartilage health. It plays a role in maintaining the structure and function of these tissues.

For your dog: If your dog is one of the breeds known to carry this gene variant, it’s worth discussing with your vet to understand what it means for their bone health and care.

Skeletal Dysplasia 2 (SD2)
Autosomal recessive
low <0.1%
n = 5,294 dogs · 1 variant tested · OMIA:001772-9615 · omia.org →
COL11A2what this gene does

COL11A2 is a gene that helps produce a type of collagen important for healthy bones and cartilage.

For your dog: If your dog is from a breed known to carry COL11A2 variants, it's worth discussing genetic testing with your vet to understand any risks.

Primary Lens Luxation (PLL)
Autosomal recessive
Pathogenic low <0.1%
n = 5,294 dogs · 2 variants tested · OMIA:000588-9615 · omia.org →
ADAMTS17what this gene does

ADAMTS17 is a gene that influences body size and also plays a role in certain eye conditions. It affects the structure of tissues in the eye and elsewhere in the body.

For your dog: If your dog belongs to a breed known to carry ADAMTS17 variants, it’s worth discussing genetic testing and eye exams with your vet to stay ahead of potential issues.

Full ADAMTS17 gene page →
Congenital Dyshormonogenic Hypothyroidism with Goiter (Discovered in the Shih Tzu)
Autosomal recessive
low <0.1%
n = 5,293 dogs · 1 variant tested · OMIA:002174-9615 · omia.org →
Early-Onset Progressive Polyneuropathy (Discovered in the Greyhound)
Autosomal recessive
low <0.1%
n = 5,294 dogs · 2 variants tested · OMIA:002120-9615 · omia.org →
NDRG1what this gene does

NDRG1 is a gene involved in nerve cell function and maintenance, helping keep the nervous system working properly.

For your dog: If your dog is from a breed known to carry NDRG1 variants, it’s worth discussing with your vet, especially if you notice any mobility issues.

Show the other 7, ordered after these by severity, then carrier frequency.
Prekallikrein Deficiency <0.1% n = 5,294
Cystinuria Type I-A (SLC3A1 p.I192V) <0.1% n = 5,294
Acral Mutilation Syndrome (AMS) <0.1% n = 5,294
Amelogenesis Imperfecta (Discovered in the Parson Russell Terrier; AI) <0.1% n = 5,294
Exercise-Induced Collapse (EIC) <0.1% n = 5,294
Pituitary-Dependent Hyperadrenocorticism (Discovered in Poodles) <0.1% n = 5,294
Thrombopathia (Discovered in the Eskimo Spitz) <0.1% n = 5,294
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: 5,294 dogs from the Donner 2023 cohort.
In plain terms

What these results mean for a Pomeranian

Degenerative myelopathy (DM)

9.0% of Pomeranians in the Donner 2023 cohort carried it (n=5,294).

  • 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.

Dilated cardiomyopathy marker (PDK4-related, first reported in Dobermans)

Marker disputed

1.8% of Pomeranians in the Donner 2023 cohort carried it (n=5,294).

  • This is a marker, not an established cause. The curated record says a test based on it is not a good indicator of heart disease risk even in Dobermans, the breed it was found in.
    OMIA 000162-9615

    “it is evident that any DNA test based on this marker will not be a good indicator of liability to this disorder in Dobermans” OMIA 000162-9615

What to do
A carrier result for this marker is not, on its own, a reason for heart screening. Heart screening is a conversation with your veterinarian about the breed and the dog.

No test, or a mix
What this marker means in breeds other than the Doberman is not established in the sources this page draws on.

Which Mendelian variants matter most for Pomeranians?

The Mendelian-disease table above lists 27 variants at observable carrier frequency, drawn from 194 variants screened in 5,294 Pomeranians (Donner 2023). All are rare in this breed. The rarest genetic vulnerabilities still warrant screening because Pomeranians are a bottleneck population, 26 dogs in the atlas, ranked 98th of 107 breeds for genetic diversity, and carrier frequency can shift quickly in small cohorts.

Von Willebrand’s Disease, Type 1 (vWD 1)

Von Willebrand’s Disease, Type 1 in Pomeranians is an autosomal-recessive bleeding disorder caused by deficiency of von Willebrand factor. Affected dogs have prolonged bleeding after injury or surgery. The carrier frequency is 8.5% (n=5,294), but penetrance is low: only 6 of 33 at-risk dogs in the Donner study showed confirmed phenotype, suggesting a maximum observed rate of 18% in that sample. Most carriers and even many homozygotes remain asymptomatic.

Testing is available. Affected dogs require careful perioperative management but can live normal lifespans with routine precautions.

What should I feed a Pomeranian?

Pomeranians weigh 3 to 7 pounds, and toy-breed hypoglycemia risk from missed meals is well recognized in small-animal veterinary practice (Chandler et al., Small Animal Clinical Nutrition, 5th ed.). Meal frequency and portion precision matter more in this breed than in most.

Hypoglycemia risk shapes meal timing. Pomeranians have high metabolic rates and low glycogen stores. Three or four small meals per day is the standard recommendation for puppies and many adults, dropping to two meals only once the dog consistently weighs more than 5 pounds and has demonstrated stable fasting tolerance. Do not skip meals or delay feeding. The NRC 2006 nutrient requirements for small-breed dogs call for metabolizable energy of 40 to 60 kilocalories per pound of body weight per day, depending on age and activity level. A 5-pound Pomeranian at baseline activity needs roughly 200 to 300 calories per day, divided across multiple meals.

Grain-free diets and this breed. The FDA flagged grain-free formulations in 2018 and 2022 in relation to dilated cardiomyopathy, particularly in breeds fed high-pulse, low-grain diets (FDA DCM Advisory 2018, updated 2022). Although the signal was strongest in large breeds, the mechanistic concern (taurine bioavailability, metabolic stress) applies across all sizes. A grain-inclusive kibble or canned diet from a manufacturer with aafco feeding trials is the safest default.

Coat and skin. The breed’s dense double coat is its signature. A diet adequate in protein (18% minimum for adults), omega-3 and omega-6 fatty acids, and B vitamins supports coat quality. The Mendelian list does include Bald Thigh Syndrome (IGFBP5, 2.1% carrier frequency) and Ehlers-Danlos Syndrome (TNXB, 4.5% carrier frequency), both of which affect skin and connective tissue, so a veterinarian should evaluate persistent coat thinning.

What we don’t know

Degenerative myelopathy in Pomeranians is rare enough that the natural history is not well defined. Most published DM data comes from German Shepherds and related breeds. We do not know whether Pomeranian carriers follow the same age-of-onset patterns or whether penetrance differs in this breed compared to others.

The Pomeranian atlas cohort is small (26 dogs), which means carrier frequencies can be sensitive to sampling. The 9.0% DM carrier frequency and 8.5% vWD 1 frequency are real in the Donner sample, but they may not be stable across the entire breed population. Larger sampling will refine these estimates.

Frequently asked questions about Pomeranians

Are Pomeranians good with kids? Pomeranians are small and have a tendency to snap if handled roughly or startled. They are best suited to families with children older than eight who understand small-dog handling. Supervision is always necessary.

How long do Pomeranians live? Cited life expectancy is 12.2 years (McMillan 2024 / VetCompass, n=2,941, 95% CI 12 to 12.5). With careful management of any cardiac carrier status and routine veterinary screening, many live into their mid-teens.

What is the most common genetic disease in Pomeranians? Degenerative myelopathy is the most common Mendelian condition tracked in this breed, with 9.0% carrier frequency (Donner 2023, n=5,294). Most carriers remain asymptomatic due to incomplete penetrance.

What should I feed my Pomeranian puppy? A small-breed puppy formula with AAFCO certification and a history of feeding trials. Feed three to four times per day to avoid hypoglycemia. Once the puppy consistently weighs above 5 pounds and maintains stable blood sugar between meals, transition to twice-daily feeding.

Why is my Pomeranian’s coat getting thin? A dense coat is the breed norm, so thinning deserves a look for nutritional, hormonal or stress-related causes. Ensure adequate protein (18% minimum), omega fatty acids, and frequent small meals. Rule out flea allergy, thyroid dysfunction, and stress-related alopecia with a veterinarian.

What is the best diet for a Pomeranian? A grain-inclusive kibble or canned formula from a manufacturer with AAFCO feeding trials, fed in three to four small meals per day until the puppy stabilizes weight and fasting tolerance. Adult Pomeranians typically transition to two meals daily. Avoid grain-free and pulse-heavy diets unless directed by a veterinary nutritionist.

Names & origins

Other names

The Pomeranian is also recorded as Deutscher Spitz, Pom, Pompom, Spitz enano, Spitz nain, Tumbleweed, and Zwergspitz.

Identified as Pomeranian (VBO:0201043) in the Vertebrate Breed Ontology (Mullen et al. 2025, CC-BY 4.0) · registry IDs iDog 187 · VeNom 14591.

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

In the atlas, the Pomeranian clusters consistently as Pomeranian (100% of the 26 dogs here). Genetic diversity is high (mean heterozygosity 0.3689), reflecting either a mixed-breed cluster or breeds with broad genetic backgrounds.

Ranks 98 of 107 on the bottleneck severity scale, among the most genetically diverse breeds in the atlas. Mean heterozygosity is 0.369, notably high, indicates broad genetic background. Low breed predictability score (0.21), individual dogs of this breed vary widely in genetics, suggesting active substructure or sub-population diversity. Only 26 dogs of this breed in the atlas, modestly sampled.

Genetic dimensions · CanVAS atlas

What the atlas genotypes say about Pomeranian

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.

Dogs in the Atlas
26Founders
15 from Hayward2016, 10 from Spatola, 1 from Shannon
Genetic diversity
0.37Diverse
Mean heterozygosity across the breed. 10th most diverse of 107 ranked populations.
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
Single tight cluster
Intra-breed RMS distance: 21.98
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 Toy 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
12.2years (life expectancy)
95% CI 12–12.5 · VetCompass, McMillan 2024, n=2,941. 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 = 26 dogs · moderate sample · CanVAS (Brundage 2026) · Sniff Atlas
Comparative oncology

Pomeranians are a natural model for human cancer.

Some cancers appear in Pomeranians and in people driven by the same somatically-altered genes, cohort by cohort and cited on both sides. That makes this breed part of how we understand, and one day treat, the human disease. This is not a prediction about your dog, it is a window into the biology we share.

The dog and human bladder cancer (invasive urothelial carcinoma) model →
A gift to human medicine

Pomeranians are a natural model for human disease

Because the same genes cause the same conditions across species, the inherited conditions documented in Pomeranians 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 Pomeranian

Beyond the testable carriers above, OMIA's literature catalogue records 9 genetic conditions in the Pomeranian, 9 of which have a known human equivalent. This is the documented landscape across all Pomeranians 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