Staffordshire Bull Terrier
Staffordshire Bull Terriers have a cited life expectancy of 12 years (McMillan 2024 / VetCompass, n=36,216, 95% CI 12 to 12.1). The most carried tested variant is L-2-Hydroxyglutaric Aciduria, in 1.5% of 610 Staffordshire Bull Terriers tested (Donner 2023). 24 dogs stand behind the atlas figures here, so treat this page as an early sketch.
Also known as Nanny Dog and Staffy.
What genetic diseases do Staffordshire Bull Terriers carry?
From a panel of 250 Mendelian-disease variants screened in 1,054,293 dogs (Donner et al. 2023), Staffordshire Bull Terriers carry 11 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.
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.
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.
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.
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.
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.
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.
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.
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.
What these results mean for a Staffordshire Bull Terrier
3.1% of Staffordshire Bull Terriers in the Donner 2023 cohort carried it (n=610).
- 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.
Other names
The Staffordshire Bull Terrier is also recorded as Nanny Dog and Staffy.
Identified as Staffordshire Bull Terrier (VBO:0201296) in the Vertebrate Breed Ontology (Mullen et al. 2025, CC-BY 4.0) · registry IDs FCI 76 · iDog 234 · VeNom 15076.
For researchers Population genetics, disease models and every recorded condition Open the research detail for the Staffordshire Bull Terrier
In the atlas, the Staffordshire Bull Terrier clusters consistently as Staffordshire Bull Terrier (100% of the 24 dogs here). Genetic diversity is high (mean heterozygosity 0.353), reflecting either a mixed-breed cluster or breeds with broad genetic backgrounds.
Ranks 89 of 107 on the bottleneck severity scale, in the upper quartile of genetic diversity. Mean heterozygosity is 0.353, notably high, indicates broad genetic background. Only 24 dogs of this breed in the atlas, modestly sampled.
What the atlas genotypes say about Staffordshire Bull 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.
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.
Staffordshire Bull Terriers are a natural model for human disease
Because the same genes cause the same conditions across species, the inherited conditions documented in Staffordshire Bull 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.
- amyotrophic lateral sclerosis type 1, modeled by the breed's Degenerative myelopathy via SOD1, the same underlying biology.
- myotonia congenita, autosomal recessive, modeled by the breed's Myotonia via CLCN1, the same underlying biology.
- cataract 5 multiple types, modeled by the breed's Cataract, early onset, HSF4-related , the same underlying biology.
- OMIM:244400, modeled by the breed's Ciliary dyskinesia, primary, generic , the same underlying biology.
- OMIM:607855, modeled by the breed's Congenital muscular dystrophy, LAMA2-related , the same underlying biology.
- OMIM:126300, modeled by the breed's Distichiasis , the same underlying biology.
Every condition recorded in the Staffordshire Bull Terrier
Beyond the testable carriers above, OMIA's literature catalogue records 11 genetic conditions in the Staffordshire Bull Terrier, 8 of which have a known human equivalent. This is the documented landscape across all Staffordshire Bull Terriers ever studied, not a prediction for any one dog.
- Degenerative myelopathy Autosomal recessiveHuman equivalent: amyotrophic lateral sclerosis type 1
- Myotonia Autosomal recessiveHuman equivalent: myotonia congenita, autosomal recessive
- Cataract, early onset, HSF4-related Autosomal recessiveHuman equivalent: cataract 5 multiple types
- Human equivalent: OMIM:244400
- Congenital muscular dystrophy, LAMA2-related Autosomal recessiveHuman equivalent: OMIM:607855
- Distichiasis MultifactorialHuman equivalent: OMIM:126300
- L-2-hydroxyglutaricacidemia Autosomal recessiveHuman equivalent: L-2-hydroxyglutaric aciduria
- Screw tail Autosomal recessiveHuman equivalent: OMIM:602151
- Rupture of the cranial cruciate ligament, susceptibility to Multifactorial
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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- 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).