Why do blood tests on pets?

We perform blood tests to check that your pet's blood cells are the normal shape and colour, are present in adequate numbers, and that internal organs are functioning normally.

The test results will also include levels of enzymes and electrolytes, which show the state of internal organs; increases or decreases in these results may alert us to a disease state of an organ. For example, for an animal about to have surgery, the liver and kidneys need to be functioning normally so the body can cope with an anaesthetic.

Whilst the vet performs an ‘external’ physical exam, blood tests are run to perform an ‘internal’ exam of red and white blood cells, and enzyme levels, to help us identify any unknown disease or health risk. For example, increases in white blood cells may mean infection, or low red blood cell levels may indicate anaemia.

In elderly animals, we will expect to see changes in organ function, e.g. we expect to see changes in liver and kidney function. Identifying these changes allows us to start supportive therapy to support the organs' function, prevent toxin build-up, and above all, increase longevity of our patients.

Regular blood tests in normal animals should be performed at least annually. Blood test changes can occur on a daily basis, so any existing disease states will require more frequent monitoring. Tests will be required immediately before any surgery - just like human surgery protocols.