What tests are needed for bleeding in dogs and cats?

Common tests include a complete blood count (red cells, white cells, platelets), a coagulation profile, a biochemistry panel, and urinalysis; imaging or specialist testing may be added as your vet sees fit.

Are bleeding disorders hereditary?

Some bleeding disorders are inherited — for example, certain clotting factor deficiencies such as Von Willebrand disease — but not all bleeding problems have a genetic cause. If a familial condition is suspected, ask your vet about genetic or specialist testing.

Will the vet recommend a blood transfusion?

The need for a transfusion depends on the volume of blood loss, blood test results, and overall clinical condition. Your vet will assess whether hospitalisation and transfusion support are required and explain the risks and expected benefits.

What can I observe at home before the vet visit?

Note the timing and frequency of bleeding episodes, photograph or video the affected area, monitor changes in alertness and appetite, and bring a list of current medications — this information helps your vet assess the situation 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

Von Willebrand Disease & Bleeding Disorders in Dogs and Cats: Symptoms, Tests & Care [2025]

An inherited coagulation disorder common in breeds such as Doberman Pinschers; affected pets may bleed excessively after surgery or injury.

Take 1 minute to check the symptoms first

Last updated: 2026/01/06

Pethealthmap Editorial Team

Sources: ACVIM, WSAVA, National Taiwan University Veterinary Hospital

When to See a Vet

Seek Emergency Care Immediately

•Heavy bleeding that is rapid and cannot stop on its own
•Large volume of deep-red blood in urine that is persistent
•Sudden loss of consciousness or collapse with no response

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

•Repeated minor nosebleeds or oral bleeding or localized oozing
•Bleeding that increases noticeably or is prolonged after activity
•Noticeable and sustained decline in energy and appetite over a short period

01What symptoms signal a problem?

Blood or clotting disorders in dogs and cats typically present as abnormal bleeding; the site and severity vary widely, so overall body condition should be assessed alongside the bleeding itself.

Repeated bleeding from the skin or mouth that is difficult to stop
Recurrent nosebleeds or nasal oozing, sometimes appearing as a trickle
Blood in the urine or urine that turns dark (tea-coloured or red)
Increased or prolonged bleeding following activity or minor contact
Changes in alertness, activity level, or appetite that correspond with bleeding episodes

Seek emergency care immediately if you notice the following symptoms:

⚠️ Seek emergency care immediately if there is heavy bleeding that cannot be controlled
⚠️ Large amounts of blood in the urine or urine that remains deep red
⚠️ Collapse or sudden loss of consciousness requires immediate emergency care

02How to assess the situation at home: key observations and when to go to the emergency vet

Recording key information at home before the appointment helps your vet quickly understand the bleeding history and timeline.

Note the time of the first episode and the duration of each subsequent bleed
Observe and record changes in alertness, appetite, and activity level
Use your phone to photograph or video the bleeding site, amount, and frequency
Weigh your pet and log recent weight changes to assist with dosage calculations
If bleeding is significant or ongoing, arrange a clinic visit as soon as possible

03How will the vet diagnose the condition? Common tests and examinations

The vet will combine a physical examination with laboratory and imaging tests to identify the bleeding source and any underlying clotting abnormality.

Physical examination

assessment of the bleeding site, wounds, and local condition

Complete blood count

red and white blood cells, platelet count, and coagulation profile

Biochemistry panel

evaluation of liver and kidney function and metabolic status

Urinalysis

checking for blood in the urine or urinary tract problems

X-ray, ultrasound, or advanced CT imaging where necessary

04How is the condition treated and managed? Medication, diet, and care guide

Treatment centres on haemostasis and supportive care, with blood transfusions or specialist referral where needed, alongside regular monitoring of clotting function and general health.

Local haemostasis or surgical intervention depending on the source of bleeding
Hospitalisation for blood transfusion or blood product support when required
Medical treatment alongside home care, with regular rechecks to monitor blood values
Scheduled follow-up for coagulation function and liver/kidney biochemistry monitoring
For chronic or recurrent bleeding, referral to a haematology specialist is recommended

05What to prepare before the vet visit: key information to help your vet work quickly

List the onset date, first bleeding episode, and frequency of subsequent episodes

Compile photos or videos showing the amount, location, and progression of bleeding

Bring a list of current medications, supplements, and any known allergies

Bring any previous blood test results or imaging reports for reference

Call ahead to book a clinic that has blood testing and transfusion capabilities

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.