Cat breed health statistics show two important patterns: common health problems occur across the wider cat population, while some genetic variants and diseases vary by breed or breeding background. The figures below come from large Finnish and genetic studies, a Cornell analysis, and research on feline infectious peritonitis (FIP). The populations, time periods, and definitions differ, so each percentage should be read in its original context.
Contents
- How broad the Finnish health survey was
- The most common health categories
- Specific conditions reported in the survey
- Pedigree, random-bred, and mixed-breed comparisons
- What genetic studies reveal
- Breed patterns in FIP research
How broad the Finnish health survey was
The Finnish Health and Behavioral Survey of over 8000 Finnish Cats covered 8,175 cats across 31 breeds. Researchers recorded 227 separate diseases and grouped them into 19 disease categories. This makes the survey useful for understanding how often different problems were reported across a broad group of cats, while still requiring care when applying the results to another country or population.
The study also identified 57 breed-specific conditions for genetic characterization. That figure describes conditions selected for further genetic investigation; it does not mean that all 57 conditions are exclusive to one breed or that every cat of a breed will develop one.
The survey found that non-pedigree cats were overrepresented compared with pedigree cats in several categories: dermatological and glandular disease, digestive-tract disease, urinary-system disease, behavioral problems, respiratory-tract disease, parasites and protozoans, and otic disease. “Overrepresented” is a comparison within the study, not a lifetime risk estimate for every non-pedigree cat.
The most common health categories
Dental and oral disease was the most prevalent disease category in most breeds in the Finnish survey. Across the full sample, dental and oral diseases had a prevalence of 28%. Dental calculus alone had a prevalence of 21%, while gingivitis had a prevalence of 8%.
The category varied substantially among the breed groups. Its lowest reported breed prevalence was 16% in Sphynx cats. Its highest was 40% in the Siamese-Balinese-Oriental-Somali group.
| Finnish survey measure | Reported figure | Population or comparison |
|---|---|---|
| Dental and oral disease | 28% | All cats in the survey |
| Dental calculus | 21% | All cats in the survey |
| Gingivitis | 8% | All cats in the survey |
| Dental and oral disease | 16% | Lowest breed prevalence, Sphynx |
| Dental and oral disease | 40% | Highest breed-group prevalence, Siamese-Balinese-Oriental-Somali |
| Parasites and protozoans | 36% | Non-pedigree cats |
Parasites and protozoans reached 36% prevalence among non-pedigree cats in the Finnish survey. Because the result applies to that study group and category definition, it should not be treated as a universal prevalence for all mixed or non-pedigree cats.
Specific conditions reported in the survey
Several individual conditions reached 4% prevalence among all cats in the Finnish dataset. These were repetitive vomiting, tail kink, feline odontoclastic resorption lesion, and urinary tract infection. The shared percentage does not imply that the conditions have the same causes, severity, or treatment implications; it only describes their reported frequency in that survey population.
The survey recorded a 3% prevalence for moderate seborrhea within the dermatological and glandular disease category. Renal failure had a 3% prevalence within the urinary-system disease category. Asthma and respiratory infection each had a 3% prevalence within the respiratory-system disease category. Food allergy had a 3% prevalence within the endocrine and metabolic disease category.
These category labels matter. A category-level percentage can include multiple diagnoses, whereas a condition-level percentage refers to a named problem. Comparing the 28% dental and oral category figure directly with the 3% asthma figure would therefore compare different levels of grouping.
Reproductive findings were reported separately for pedigree female cats. Cesarean section had a 7% prevalence in that group, and stillborn kittens had a 6% prevalence. The Finnish study also reported undescended testis at 2% within its male genital disease category.
Pedigree, random-bred, and mixed-breed comparisons
The available research uses several population terms that should not be treated as interchangeable. Pedigree and purebred refer to documented breeding categories in the relevant studies. Random-bred and non-pedigree describe other study groupings, while mixed-breed is the comparison group used in the FIP breed study.
The Cornell Complex Feline Disease Mapping Using a Dense Genotyping Array paper stated that random-bred cats accounted for 84% of the cat population in the United States. It also reported that random-bred cats made up 89% of Cornell University Hospital for Animals admissions over the previous 15 years. Those figures describe population and hospital-admission contexts, respectively; they are not disease rates.
The Finnish survey found non-pedigree cats overrepresented in seven disease categories compared with pedigree cats: dermatological and glandular disease, digestive-tract disease, urinary-system disease, behavioral problems, respiratory-tract disease, parasites and protozoans, and otic disease. The supplied findings do not provide an effect size or percentage difference for each of those comparisons.
In the study Prevalence of feline infectious peritonitis in specific cat breeds, mixed-breed cats had an FIP prevalence of 0.35%, compared with 1.3% in purebred cats. Abyssinian, Bengal, Birman, Himalayan, Ragdoll, and Rex cats had significantly greater FIP prevalence than mixed-breed cats in that study.
The FIP percentages should be kept separate from the Finnish survey figures. They measure a different disease, use different breed groupings, and come from a separate study. They also do not establish that breed alone causes FIP.
What genetic studies reveal
The Cornell dense-genotyping study genotyped 1,122 cats, including 31 purebreds and 905 random-bred cats. Its proprietary array contained 340,000 single-nucleotide polymorphism (SNP) markers, making it more than five times denser than the commercial 63,000-marker array used for comparison.
The paper cited 389 hereditary disorders of cats in its background discussion. Of those, 127 were Mendelian traits, and 148 had likely causal variants identified. The paper also said that 260 hereditary feline disorders were potentially good models for human disease. These counts describe the state of cataloging and genetic research discussed in the paper, not the number of disorders found in the 1,122 genotyped cats.
The PLOS Genetics study Genetic epidemiology of blood type, disease and trait variants, and genome-wide genetic diversity in over 11,000 domestic cats evaluated 87 variants across domestic cats. Its sample included 10,419 pedigreed cats and 617 non-pedigreed cats. The pedigreed cohort represented 90 breeds and breed types, and 60 of those breeds and breed types had at least 15 individuals.
Among Abyssinian cats, the reported PK-def variant frequency was 3.1%. Among Somali cats, it was 2.2%. The associated variant was also present in 21 additional breeds beyond Abyssinian and Somali. A variant frequency is not the same as disease prevalence: it indicates how often the genetic variant was observed in the sampled population.
The same PLOS Genetics study found feline MDR1 medication sensitivity in 126 of 11,036 cats, or 1.1%. This is a measured frequency in the study sample, not a prediction that 1.1% of every cat population will respond sensitively to medication.
That paper also reported 84% random-bred cats in the U.S. household cat population context and 89% random-bred cats among Cornell hospital admissions over the prior 15 years. The repeated figures provide context for why genetic studies may contain many random-bred cats even when their main focus is breed-associated variation.
Breed patterns in FIP research
Feline infectious peritonitis research illustrates why breed statistics need careful interpretation. The FIP breed study reported prevalence of 0.35% in mixed-breed cats and 1.3% in purebred cats. It identified Abyssinian, Bengal, Birman, Himalayan, Ragdoll, and Rex cats as having significantly greater FIP prevalence than mixed-breed cats.
Separately, the 2014 review Feline Infectious Peritonitis by A. Kipar and M. L. Meli noted that feline coronavirus (FCoV) infection can exceed 90% in multicat environments. The review also stated that FIP morbidity rarely surpasses 5% of infected cats. FCoV infection and FIP are therefore different measures: a high infection figure does not mean that the same share of infected cats develops FIP.
The two FIP figures also describe different stages of the disease process. The 0.35% and 1.3% values are FIP prevalence figures for breed groups in the breed study. The “exceed 90%” figure concerns FCoV infection in multicat environments, while the “rarely surpasses 5%” figure concerns FIP morbidity among infected cats in the review. Keeping those denominators visible prevents misleading comparisons.
Across these studies, the clearest health message is that breed can be relevant without being destiny. Dental and oral disease was common across the Finnish survey, genetic variants appeared across multiple breeds, and FIP research found differences between purebred and mixed-breed groups. The most useful interpretation is to match each statistic to its population, disease definition, measurement period, and study design.