Veterinarian-written / veterinarian-approved articles for your cat.

Diagnostic Testing

Tests, Tests and More Tests!

cat_vet_testingThis is just what you might be thinking as the veterinarian informs you that $125.00 of tests need to be run to help find out more about Kitty! It might seem like a lot, but it is money well spent.

Cats are not very good at sharing their problems. In fact, they are well known to hide illness until it is in advanced stages! This means that we often rely on diagnostic testing to help us localize or characterize a problem. We also run tests to do wellness screening to determine whether everything is working OK in there. A lot of conditions cannot be picked up based on a physical examination or by taking a thorough history. Early blood cancer, early kidney disease, early heart disease and other conditions may be identified on tests well before clinical signs of the illness occur.

Tests may also be done to monitor disease progression, or success of drug management. Serial blood sugar tests for diabetics, or kidney function tests for chronic kidney disease are examples of this type of strategy. Cost of tests varies considerably. Some tests that need to be sent out to laboratories may take some time to be reported, so patience is needed in some instances.

So what do all of these test names mean?


The complete blood count is frequently recommended because it provides a great deal of information about the red cells that carry oxygen, the white cells that protect the cat from infections, platelets that help blood clotting, and the liquid portion of the blood called the plasma. Cell counts, the proportion of red cells (hematocrit, PCV [packed cell volume]) and different classes of white cells, the size and shape of cells, and microscopic appearance of the cells (maturity, granules, staining) are all carefully determined.

Blood Profile (also termed Blood screen, Blood Chemistry Panel)

This test provides important information about blood components such as sugars, proteins, electrolytes (potassium, sodium etc), and additional tests may be done to assess hormones (thyroid hormones etc). Organ function assessments are routinely included. Particularly important are the tests that measure function of the liver and kidneys.

Viral Screen

Your veterinarian will recommend testing of new cats, cats going outdoors, breeding/cattery/multi-cat household cats, and cats exposed to sick cats. Feline Leukemia Virus (FeLV) and Feline Immunodeficiency Virus (FIV) are the standard. Testing for Feline Infectious Peritonitis (FIP) will not be done routinely, but in certain circumstances such as early weaning programs for catteries, testing may be suggested.

Fecal Tests

This test requires that you bring us a fresh sample from the litter box of the kitty’s bowel movements (poop). The staff will run a flotation test to determine whether parasite eggs are present, and may also run a smear to look for single-celled parasites such as Giardia. It sounds yucky, but is an essential part of preventive health care! In kittens, even if eggs are not found in the first sample, worming treatments will be recommended due to the risk of transfer of some of these gut parasites to people.

Urine Analysis (Urinalysis)

Getting a sample at home can be tough with cats. Placing a bit of plastic wrap over the litter loosely may allow you to gather a clean urine sample--use the supplied transport container. The sample needs to be very fresh, and kept cool until dropped into the hospital. Otherwise, in order to get a sample, veterinary staff will either express the bladder at the hospital, or perform a cystocentesis which is a procedure that introduces a very small needle through the body wall into the bladder to obtain a sterile urine sample. This latter method will be used if the urine is being cultured for infections. Urine will also be checked for excess sugar or protein, concentration, color, and presence of bacteria, crystals, and excess red or white cells.

Skin Scraping and Other Parasite Tests

If Kitty is scratching, or if the veterinarian suspects she carries ringworm, a hair pluck/toothbrush and fungus culture will be done. A black light may also be shone over the fur and skin. If mites are suspected, a blade is passed over the skin to remove a layer of skin cells and this is termed a skin scraping. Scabies and demodex type mites live below the surface, and a deep scraping will be done. Don’t worry if the skin surface bleeds a bit. This means the test is being done properly! Surface mites (Cheyletiella) may be harvested by a surface scraping, scotch tape press, or just a visual examination with a magnifying glass for the fur mites. An otoscope will be used to check for ear mites, and sometimes a smear of debris is mounted under the microscope to look for the mites.

Electrocardiogram (ECG)

This is done the same way as in people. A few clips are placed on the skin at set locations. This is a quick procedure and causes no discomfort so most cats sit happily while the ECG recordings are done. This is an important screening test in cats since heart disease may not show up as an obvious illness until it is quite advanced.

Routine Survey Radiography (X-Rays)

Chest X-Rays are frequently suggested for senior cats, cats with chronic respiratory disease such as asthma, or cats that are suspected to have heart disease.

Dental X-rays may be used to monitor the health of the roots of the teeth in cats. Cats affected by inflammation of the mouth tissues (periodontitis, stomatitis, marked gingivitis), cat “cavities” (termed FORLs or feline odontoclastic resorptive lesions), or broken or misaligned teeth will all benefit from the test.

Hip and stifle X-Rays may be taken to monitor cats in certain breeds known to be at high risk for hip dysplasia or displaced knee caps (luxating patella). The Devon Rex, Maine Coon, and Abyssinian breeds are examples of breeds with suspected increased risk.

Your veterinarian will be happy to explain costs, risks and benefits, and what the purpose of a test is if you are not sure.

Disclaimer: This website is not intended to replace professional consultation, diagnosis, or treatment by a licensed veterinarian. If you require any veterinary related advice, contact your veterinarian promptly. Information at is exclusively of a general reference nature. Do not disregard veterinary advice or delay treatment as a result of accessing information at this site.