Why appearance is not enough
Older dogs and cats can look well while kidney, liver or metabolic changes are developing. Blood tests may reveal abnormalities that are not obvious during a physical examination.
But a blood test does not answer every question. Results must be interpreted alongside medical history, examination and, where needed, urine or other tests.
When to discuss testing
The need depends on age, breed, medical history and medication. During a preventive check, a veterinarian may suggest baseline results for comparison in the future.
If your pet starts drinking more, losing weight, eating poorly or tiring quickly, do not wait for the next routine check.
What blood tests can show
A complete blood count evaluates blood cells, while chemistry tests may provide information about kidney and liver function, glucose and other measures.
Small deviations do not always mean disease, and normal values do not exclude every illness. Your veterinarian should explain the findings.
Preparing for tests
Ask the clinic whether any feeding changes are needed. Fasting is not required for every test and may be inappropriate for some animals.
Bring previous laboratory results and a list of medicines. Earlier values can be especially useful for tracking change over time.
FAQ
Blood tests for senior pets: when are they useful??
Ask the clinic whether any feeding changes are needed. Fasting is not required for every test and may be inappropriate for some animals.