This episode explains chronic kidney disease in cats — why it’s so common in older cats, how kidney function declines over time, the early warning signs owners can miss, and how vets diagnose it. It covers the role of urine testing, why early intervention matters, prescription renal diets, medications used as the disease progresses, and how related issues like high blood pressure and dental disease can affect kidney health.
Podcast Summary: Understanding Kidney Disease in Cats
- Kidney disease is extremely common in ageing cats and often develops gradually as functional kidney tissue is lost over time.
- Cats may tolerate reduced kidney function for years; visible symptoms often don’t appear until function has dropped significantly.
- Early signs can be subtle, but common changes include weight loss (especially muscle loss), increased thirst, and producing larger volumes of urine.
- Urine concentration testing is a valuable early screening tool — dilute urine can be an early warning sign before severe symptoms develop.
- Diagnosis typically involves blood and urine tests, and sometimes ultrasound to assess kidney size and structure.
- Prescription renal diets are a cornerstone of treatment and can significantly extend both lifespan and quality of life when started early.
- Renal diets use lower (but high quality) protein, reduced phosphate, and different energy profiles to reduce stress on the kidneys.
- Dental disease is highlighted as a major contributor to kidney decline in cats, making dental checks and oral health important preventive care.
- As disease progresses, cats may need phosphate binders, blood-pressure medications to support kidney filtration, and treatment for complications.
- High blood pressure can develop secondary to kidney disease and may cause sudden vision loss from retinal damage.
- Anaemia can occur because kidneys help regulate red blood cell production, and some cats need extra support for this.
- Kidney damage can’t be reversed, but early diagnosis and management can slow progression and keep cats comfortable for years.
- Other conditions (like hyperthyroidism) can look similar, so testing is important rather than guessing based on symptoms.
Jump to a Section
- 00:02 – 02:15 — Why kidney disease is so common in older cats
- 02:15 – 03:28 — What “renal failure” actually means
- 03:29 – 05:51 — Symptoms: weight loss, muscle loss, increased urine volume
- 05:51 – 07:04 — Early screening: urine concentration tests and routine monitoring
- 07:04 – 08:22 — Diagnosis: bloods, urine tests, ultrasound and ruling out infection
- 08:23 – 12:09 — Treatment foundation: prescription renal diets and why they help
- 12:09 – 15:20 — Dry vs wet food, palatability, and why diet change is often step one
- 15:20 – 18:08 — Medications: phosphate binders, kidney-support drugs, complications
- 18:08 – 20:39 — Causes: dental disease, genetics, and discussion of kidney transplants
- 20:39 – End — How long cats can live with kidney disease and why early testing matters
General advice only. Always consult your veterinarian for diagnosis and a treatment plan tailored to your cat.