Companion Animals

Cat Feline Interstitial Nephritis Welfare

Interstitial nephritis is the most common histopathological finding in feline chronic kidney disease, causing progressive welfare decline over months to years.

Key Facts

Interstitial nephritis causes progressive replacement of functional kidney tissue with scar tissue
The cause is often not identified but may include chronic toxin exposure, dental disease, or infection
Gradual deterioration allows adaptation that masks clinical signs until disease is advanced
Regular blood and urine testing detects disease before clinical signs appear
Dietary protein restriction and phosphorus management slow progression when started early

Welfare Considerations

Cats with advanced interstitial nephritis experience nausea, weight loss, dehydration, and progressive weakness. Regular monitoring allows early intervention that slows progression and extends comfortable quality of life.

What You Can Do

Screen cats over 7 years for kidney disease annually with blood and urine testing
Start phosphorus restriction and kidney diet when early kidney disease is confirmed
Provide fresh water and wet food throughout life to minimize renal burden