Anaemia in Pets: Which Blood Tests Help Find the Cause
Short answer
Anaemia means too few red blood cells or too little haemoglobin. A complete blood count shows it, and further tests help tell whether red cells are being lost, destroyed or not made well enough.
By Pashupatinath Vet Lab Share
Anaemia means the blood has too few red cells, or too little haemoglobin, the part of each cell that carries oxygen. Blood tests help find the cause by showing whether red cells are being lost, destroyed or not made well enough. A complete blood count is the usual first step, and a registered veterinarian decides what to add next.
What does anaemia look like at home?
Anaemia is a finding, not a disease, and it often creeps in slowly. A dog or cat may seem tired, give up early on walks, eat less, breathe faster or sleep more than usual. The gums and the inner eyelids may look pale pink or white instead of a healthy pink. Some dogs have dark gums, so the inner eyelid can be easier to check. A yellow tint in the gums or eyes can appear when red cells are breaking down.
A pet that is very pale, weak or has collapsed needs a vet at once. Do not wait for test results before asking for help.
Why do red cells run low?
There are three broad reasons, and the tests are chosen to tell them apart:
- Loss: bleeding from an injury or from the gut, or blood drained by heavy tick, flea or worm burdens.
- Destruction: red cells are broken down faster than the body can replace them. Blood parasites, the pet's own immune system or some toxins can do this.
- Poor production: the bone marrow, where red cells are made, is not keeping up. Long-term illness, kidney disease or a shortage of iron may be behind it.
More than one reason can be present together, which is why the vet reads the whole picture rather than a single number.
What does the complete blood count show?
The Complete Blood Count (CBC) counts the red cells and measures their haemoglobin, the share of the blood they fill and the size of the cells. It also counts white cells and platelets, and these can add clues. Low platelets together with anaemia, for example, may make a vet think of a tick-borne infection. The size of the cells and how much haemoglobin they carry can also hint at the type of anaemia. The report shows a reference range beside each result, and your vet reads it with your pet's age, signs and history.
How does the reticulocyte count point to the cause?
Reticulocytes are young red cells that the bone marrow has just released. A healthy marrow facing anaemia sends out more of them, so the Reticulocyte Count shows whether the marrow is responding. Many young cells point towards loss or destruction. Few young cells in an anaemic pet suggest the marrow is not keeping up. A response takes time to build, so a very recent bleed may not show it yet, and your vet may repeat the count later.
Which other tests may be added?
Once the pattern is clearer, your vet may choose from several tests:
- A Blood Protozoa (Blood Parasite Smear), where a stained drop of blood is viewed under a microscope for parasites in or on red cells. A negative smear does not always rule parasites out.
- A Heinz Body Examination, which looks for Heinz bodies, small clumps of damaged haemoglobin inside red cells. They can follow damage from some chemicals, plants or illnesses, and cats are more prone to them.
- An Iron test, which measures the iron travelling in the blood. Low iron can be linked with long-term blood loss.
- Tests of the stool, urine, kidneys or clotting, when the history points that way.
Some of these tests can share a single blood draw, although they may need different tubes. Tell your vet about ticks, fleas, deworming, and anything your pet may have eaten or touched. These details often decide which test is worth doing first.
Read next
To read each line of the blood count with confidence, see Understanding Your Pet's CBC Report: What the Numbers Mean. If your vet suspects that the body's own defences are breaking down red cells, Immune-Mediated Anaemia: Coombs Test and Saline Agglutination explains the special tests used in that situation.
Testing in Bhopal
For a pet with pale gums, the blood sample is the starting point, and you can arrange it by calling or sending a WhatsApp message to +91 88175 01118. Collection at your door is free anywhere in Bhopal, from the lab at C-200, C Sector, Shahpura. If you live in another district, ask your vet to send the blood by courier or bus parcel. The lab confirms the method, sample needs and reporting time when you book, including which tubes each test needs.
This article is general information and does not replace a veterinarian’s advice. Please talk to a registered veterinarian about your animal’s signs, tests and treatment.