What are the common symptoms of neutropenia in dogs and cats?

Common symptoms include recurrent diarrhoea (possibly with blood), fever, decreased energy, and loss of appetite. Oral or skin infections should also be taken seriously. Seek veterinary assessment promptly.

How does the vet diagnose neutropenia?

Diagnosis is primarily based on a complete blood count (CBC) to confirm neutrophil levels, alongside blood biochemistry, urinalysis, and faecal testing to identify possible causes; imaging or specialist referral may be needed.

What can I observe and prepare at home?

Record the number of diarrhoea episodes, stool colour, temperature, appetite, and water intake at home. Collect a fresh stool sample and film a short video of symptoms to help your vet assess and arrange testing quickly.

How much do the tests and treatment usually cost?

Costs vary by clinic and region — ask your vet for an estimate before proceeding.

Disease Guide

Neutropenia in Dogs & Cats: Symptoms, Blood Tests & Care Guide [2025]

Neutropenia means reduced infection-fighting ability and can be caused by infection, medications, or bone marrow problems — treatment depends on the underlying cause.

Take 1 minute to check the symptoms first

Last updated: 2026/01/06

Pethealthmap Editorial Team

Sources: ACVIM, WSAVA, National Taiwan University Veterinary Teaching Hospital

When to See a Vet

Seek Emergency Care Immediately

•Persistent high fever with marked lethargy and significantly reduced appetite
•Severe diarrhea accompanied by continuous vomiting and weakness
•Obvious heavy bleeding from the mouth or skin

Schedule a Clinic Visit Soon (within 24–72 hours)

•Recurrent bloody diarrhea with decreased energy and activity
•Noticeably reduced appetite and decreased water intake lasting more than one day
•Recurring oral ulcers or skin infections that are not improving

01What Symptoms Indicate a Problem?

Dogs and cats with neutropenia commonly show gastrointestinal signs, fever, and decreased energy — watch for recurring or worsening changes.

Recurrent or persistent diarrhoea, possibly with blood or mucus in the stool
Elevated body temperature accompanied by a noticeable drop in energy and activity
Reduced appetite and significantly decreased food intake
Changes in defecation frequency or a sudden change in toileting habits
If oral ulcers or skin infections are also present, seek veterinary assessment sooner

Seek emergency care immediately if you notice the following symptoms:

⚠️ Persistent high fever with severe lethargy and markedly reduced appetite
⚠️ Severe diarrhoea with persistent vomiting and weakness
⚠️ Obvious heavy bleeding from the mouth or skin

02How to Assess Abnormalities at Home? Key Observations and Emergency Warning Signs

Key information you can record at home — including symptom onset, changes in bowel habits, temperature, and diet — helps your vet assess the situation efficiently.

Record the number of diarrhoea episodes, stool colour, and whether blood is present
Measure body temperature daily and note the time and reading
Monitor for changes in alertness, activity level, and responsiveness
Note any changes in appetite, food intake, and water consumption
Collect a fresh stool sample and bring it to your vet appointment
Organise your records and arrange a vet visit as soon as possible

03How Will the Vet Make a Diagnosis? Common Diagnostic Tests

Your vet will use a systematic examination and diagnostic tests to identify the possible cause and complications of neutropenia, and assess whether hospitalisation or further testing is needed.

Complete blood count (CBC)

directly measures white blood cell and neutrophil levels

Blood biochemistry panel

assesses liver and kidney function and electrolyte status

Urinalysis

rules out urinary tract infection and evaluates hydration status

Faecal examination or bacterial/parasite testing

identifies potential sources of infection

Imaging (X-ray or CT if needed)

evaluates internal organs and abdominal cavity

Physical examination

assesses hydration, lymph nodes, and oral health

Referral for advanced diagnostics or hospitalisation may be recommended if necessary

04How to Treat and Care After Diagnosis? Medication, Diet Adjustment & Care Guide

Treatment focuses on controlling infection and providing supportive care, with regular monitoring of blood values and clinical signs, and close observation at home to report any changes to your vet.

Treatment is determined by your vet and may include anti-infective therapy and supportive care
Adjust diet and ensure adequate hydration, following your vet's care instructions
If invasive procedures or surgery are needed, your vet will discuss the options with you
Schedule regular follow-up visits to monitor blood counts and clinical progress
Continue monitoring temperature, bowel movements, and energy levels at home and report changes to your vet
If the condition recurs or does not improve, referral to an infectious disease specialist or larger hospital is recommended

05What to Prepare Before the Vet Visit? Keys to Helping Your Vet Diagnose Quickly

Write down when symptoms started and the timeline of changes

Bring a record of bowel movements from the past week and a fresh stool sample

List all current and recent medications or supplements

If possible, take a short video of your pet's energy level and toileting behaviour to show the vet

Bring vaccination records and any previous test results if available

It is recommended to call ahead and book a clinic that can perform blood tests

This content is for reference only and cannot replace a professional veterinary diagnosis. If your pet shows signs of illness, please seek veterinary care promptly.