Cat Polycystic Kidney Disease: Genetic Testing and Welfare

Polycystic kidney disease in cats is a genetic condition causing progressive kidney cyst development and renal failure, with genetic testing enabling responsible breeding to reduce prevalence.

Key Facts

PKD1 gene mutation causes autosomal dominant PKD in Persian and related breeds, with up to 49% prevalence historically
Affected cats develop renal cysts from birth that progressively enlarge and destroy kidney tissue
Clinical signs of renal failure typically appear in middle age (7-10 years) as functional kidney tissue is lost
A DNA test identifies the PKD1 mutation, enabling breeding programs to exclude affected individuals
Breeding exclusion programs have substantially reduced PKD prevalence in some Persian breeding populations
Management of PKD-associated CKD follows standard chronic kidney disease protocols

Welfare Considerations

PKD causes progressive and ultimately fatal kidney disease that imposes growing welfare costs over years to decades. The later-onset nature means cats may develop strong bonds with owners before showing clinical signs, making end-of-life management emotionally difficult. The genetic nature of the disease means prevention through testing-based breeding exclusion is genuinely achievable, making continued breeding of affected animals ethically questionable. Breed clubs that mandate PKD testing represent welfare leadership that should be recognized and supported.

What You Can Do

Request PKD genetic test results for both parents before purchasing a Persian, Exotic, or British Shorthair kitten
Support breed clubs that mandate PKD testing as a condition of registration
Have existing Persian cats PKD-tested before using them in breeding programs
Monitor kidney health with annual urinalysis and blood testing in PKD-affected breeds from 7 years of age
Advocate for mandatory genetic testing standards for heritable diseases in pedigree cat registration