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Senior Cat
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Senior Cat: lab tests and health checks

The older years of a cat's life, when kidney, thyroid and heart problems become more common.

Weight loss, drinking more, a big appetite or a new heart murmur are common reasons to test an older cat. Kidney disease, an over-active thyroid, diabetes and heart disease can look alike, so vets often test them together. This page lists the usual tests.

Why testing changes at this age

In older cats several illnesses can happen at once and hide each other. Reading kidney, thyroid, sugar and heart results together gives a safer picture than any single test.

What vets often check

The main checks for a senior cat

Kidney checks

KFT, SDMA and a urine test show how well the kidneys filter and whether protein is leaking.

Thyroid and sugar

T4 and blood sugar help separate an over-active thyroid from diabetes and kidney disease.

Heart markers

NT-proBNP and troponin I can help when a cat has fast breathing or a heart murmur.

Liver and pancreas

Liver tests and the pancreas-specific lipase help when an older cat vomits or stops eating.

A registered veterinarian chooses the tests that suit your animal's signs, age and history. This page is general information, not advice for one animal.

Health packages for a senior cat

A wider yearly check for older dogs and cats: blood, liver, kidney, sugar, thyroid and urine.

  • CBC
  • LFT (liver function)
  • + 5 more tests

Call to confirm

Kidney check

Kidney Care Panel

Kidney markers, urine protein and salts together, for dogs and cats with kidney worries.

  • KFT (kidney function)
  • SDMA
  • + 4 more tests

Call to confirm

Liver check

Liver Care Panel

Liver enzymes, bile acids and proteins together, for dogs and cats with liver worries.

  • LFT (liver function)
  • GGT
  • + 3 more tests

Call to confirm

Thyroid & kidney

Cat Thyroid & Kidney Check

Cat T4 with kidney, sugar and blood count checks, for older cats that are thin, thirsty or restless.

  • Feline T4 (fT4)
  • KFT (kidney function)
  • + 2 more tests

Call to confirm

Heart strain and heart muscle markers with T4 and kidney checks, for cats with heart worries.

  • Feline NT-proBNP
  • Feline troponin I (fTnI)
  • + 2 more tests

Call to confirm

Tests to ask about

All cat tests

Complete Blood Count (CBC)

Whole blood (EDTA) · Popular

₹400

Liver Function Test (LFT)

Serum (plain) · Popular

₹700

Kidney Function Test (KFT)

Serum (plain) · Popular

₹700

Glucose Random (RBS)

Fluoride plasma

₹180

Urine Routine

Urine · Popular

₹300

Microalbuminuria (Urine Albumin)

Urine

Call to confirm

SDMA (Symmetric Dimethylarginine)

Serum

₹2,200

Feline Pancreatic Lipase (fPL)

Serum

₹1,200

Feline T4 (fT4)

Serum

₹1,500

Feline NT-proBNP

Serum

₹1,500

Feline Troponin I (fTnI)

Serum or heparin plasma

Call to confirm

Guides for a senior cat

Age & Life Stage 4 min read

Senior Cat Kidney and Thyroid Checks Explained

An older cat that is losing weight, drinking a lot or eating hungrily may have a thyroid or kidney problem. A T4 test, kidney tests with SDMA and a urine test can help your vet find out.

18 Oct 2026

Age & Life Stage 4 min read

Heart Blood Tests for Cats: NT-proBNP and Troponin

Heart blood tests for cats are NT-proBNP, which can show heart strain, and troponin I, which can show heart muscle injury. Cats hide heart disease well, so these tests help a vet but never replace a heart scan.

18 Oct 2026

Age & Life Stage 4 min read

Pre-Anaesthetic Tests for Young and Old Pets

Pre-anaesthetic tests are blood checks done before an operation so the vet can plan the anaesthetic around the pet's own body. Young and old pets raise different questions, and a normal result is not a promise of no risk.

18 Oct 2026

Questions about testing a senior cat

Which lab tests matter most for a senior cat?
Kidney tests, T4, blood sugar and a urine test are common, with heart markers if there are signs. A registered veterinarian chooses the tests that suit your animal's signs, age and history.
Why does a vet test thyroid and kidneys together in a cat?
An over-active thyroid can make the kidneys look better than they are, and kidney disease is common in older cats. Testing both gives a safer picture.
Can a normal blood test rule out heart disease in a cat?
No. Heart markers help, but a heart scan and ECG show the heart itself. A vet decides which tests are needed.

Ready to get your animal tested?

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