Giant Schnauzer
Giant Schnauzers have a cited life expectancy of 12.1 years (McMillan 2024 / VetCompass, n=369, 95% CI 11.5 to 12.8). The most carried tested variant is Progressive Rod-Cone Degeneration, in 13% of 229 Giant Schnauzers tested (Donner 2023), then Hyperuricosuria (12%).
Also known as Munchener, Munich Schnauzer, Riesenschnauzer, and Russian Bear Schnauzer.
What genetic diseases do Giant Schnauzers carry?
From a panel of 250 Mendelian-disease variants screened in 1,054,293 dogs (Donner et al. 2023), Giant Schnauzers carry 6 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.
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.
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.
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.
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.
NHEJ1what this gene does
NHEJ1 is a gene involved in repairing breaks in DNA, helping maintain the integrity of genetic information in cells.
For your dog: If your dog belongs to one of the breeds known to carry this gene variant, it's worth discussing testing with your vet to understand any potential eye health risks.
ABCA4what this gene does
ABCA4 is a gene that helps manage the transport of molecules in the retina, the part of the eye responsible for vision.
For your dog: If your dog is from a breed known to carry ABCA4 variants, it's worth discussing eye health with your vet, especially as they age.
Other names
The Giant Schnauzer is also recorded as Munchener, Munich Schnauzer, Riesenschnauzer, Russian Bear Schnauzer, and Schnauzer, Giant.
Identified as Giant Schnauzer (VBO:0200604) in the Vertebrate Breed Ontology (Mullen et al. 2025, CC-BY 4.0) · registry IDs FCI 181 · iDog 114 · VeNom 14671.
For researchers Population genetics, disease models and every recorded condition Open the research detail for the Giant Schnauzer
In the atlas, the Giant Schnauzer clusters consistently as Giant Schnauzer (100% of the 126 dogs here).
High breed predictability score (2.21), individual dogs of this breed reliably cluster together genetically.
What the atlas genotypes say about Giant Schnauzer
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.
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.
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.
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.
Giant Schnauzers are a natural model for human disease
Because the same genes cause the same conditions across species, the inherited conditions documented in Giant Schnauzers 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.
- thyroid dyshormonogenesis 2A, modeled by the breed's Hypothyroidism, congenital via TPO, the same underlying biology.
- narcolepsy 1, modeled by the breed's Narcolepsy via HCRTR2, the same underlying biology.
- dilated cardiomyopathy 1DD, modeled by the breed's Cardiomyopathy, dilated, RBM20-related , the same underlying biology.
- congenital factor VII deficiency, modeled by the breed's Factor VII deficiency , the same underlying biology.
- OMIM:618882, modeled by the breed's Intestinal cobalamin malabsorption, AMN-related , the same underlying biology.
- developmental and epileptic encephalopathy, 21, modeled by the breed's Retinal atrophy, progressive, NECAP1-related , the same underlying biology.
Every condition recorded in the Giant Schnauzer
Beyond the testable carriers above, OMIA's literature catalogue records 8 genetic conditions in the Giant Schnauzer, 8 of which have a known human equivalent. This is the documented landscape across all Giant Schnauzers ever studied, not a prediction for any one dog.
- Hypothyroidism, congenital Autosomal recessiveHuman equivalent: thyroid dyshormonogenesis 2A
- Narcolepsy Autosomal recessiveHuman equivalent: narcolepsy 1
- Cardiomyopathy, dilated, RBM20-related Autosomal recessiveHuman equivalent: dilated cardiomyopathy 1DD
- Factor VII deficiency Autosomal recessiveHuman equivalent: congenital factor VII deficiency
- Intestinal cobalamin malabsorption, AMN-related Autosomal recessiveHuman equivalent: OMIM:618882
- Retinal atrophy, progressive, NECAP1-related Autosomal recessiveHuman equivalent: developmental and epileptic encephalopathy, 21
- Squamous cell carcinoma of the digit MultifactorialHuman equivalent: OMIM:184745
- Urolithiasis Autosomal recessiveHuman equivalent: OMIM:220150
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.
Some things about living with a giant schnauzer never make it into a database. Add what you know as a Keeper, in your words →
Lived experience, kept beside the science.We have 126 giant schnauzers. We do not have yours.
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- 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
- Brundage DM (2026). CanVAS: A Harmonized and Imputed Canine Variant Atlas. bioRxiv. doi:10.64898/2026.04.13.718238
- 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).