Haemophilia in Dogs: Signs, Diagnosis, and Vet Treatment

What is haemophilia in dogs and how serious is it?

Haemophilia in dogs is a hereditary clotting factor deficiency that prevents blood from clotting normally, causing prolonged or spontaneous bleeding. It is one of the most common inherited blood disorders in dogs and can be life-threatening without proper veterinary management. MaxPetz in Delhi provides specialist veterinary care for canine blood disorders, including haemophilia diagnosis and ongoing treatment.

There are two primary forms of haemophilia in dogs:

• Haemophilia A — caused by a deficiency of clotting Factor VIII; the more common form.
• Haemophilia B — caused by a deficiency of clotting Factor IX; also called Christmas disease.

Both types are X-linked recessive conditions, meaning they are carried on the X chromosome. Male dogs are predominantly affected, while female dogs typically act as carriers.

What are the signs of haemophilia in dogs?

Signs of haemophilia in dogs can range from mild to severe depending on the degree of clotting factor deficiency. Bleeding episodes may occur spontaneously or following minor trauma, surgery, or vaccination. Recognising these signs early is critical for prompt treatment.

• Prolonged bleeding from minor cuts, wounds, or injection sites
• Ecchymosis (bruising) appearing without obvious injury
• Petechiae — small, pinpoint red or purple spots on the skin or gums
• Swollen, painful joints due to bleeding into joint spaces (haemarthrosis)
• Spontaneous nosebleeds (epistaxis)
• Blood in urine (haematuria) or faeces
• Excessive bleeding after surgery, dental procedures, or neutering
• Pale gums, weakness, or collapse in severe cases indicating significant blood loss
• Subcutaneous haematomas (lumps of pooled blood under the skin)

Is haemophilia in dogs hereditary?

Yes, haemophilia in dogs is an inherited blood disorder. It follows an X-linked recessive pattern of inheritance, which explains why male dogs are far more commonly affected than females.

Key points about inheritance and triggers:

• Female dogs with one affected X chromosome are carriers and may pass the condition to male offspring.
• Two copies of the defective gene are required for a female dog to be clinically affected — this is rare.
• Bleeding episodes can be triggered by surgery, trauma, vaccinations, dental extractions, or even vigorous play.
• Spontaneous internal bleeding can occur without any identifiable trigger in severely affected dogs.

How is haemophilia diagnosed in dogs?

Diagnosing haemophilia in dogs requires a combination of clinical history, physical examination, and targeted laboratory testing. A veterinarian will assess coagulation profiles to identify which clotting factor is deficient and to what degree.

Diagnostic steps typically include:

1. Complete Blood Count (CBC) — to assess red blood cell levels and detect anaemia from blood loss.
2. Coagulation panel — including Prothrombin Time (PT), Activated Partial Thromboplastin Time (aPTT / PTT), and Activated Clotting Time (ACT). A prolonged aPTT with a normal PT is a key indicator of haemophilia A or B.
3. Specific clotting factor assays — to confirm Factor VIII or Factor IX deficiency and quantify severity.
4. Buccal mucosal bleeding time (BMBT) — to rule out platelet disorders.
5. Genetic testing — available for certain breeds to confirm the mutation and identify carrier females.

Severity is classified based on residual factor activity:

• Severe: less than 1% factor activity — frequent spontaneous bleeding
• Moderate: 1–5% factor activity — bleeding with minor trauma
• Mild: 5–25% factor activity — bleeding mainly after significant injury or surgery

For expert blood disorder diagnosis in dogs, consult the veterinary team at MaxPetz Delhi.

How is haemophilia treated in dogs?

There is currently no permanent cure for haemophilia in dogs, but the condition can be managed effectively with veterinary treatment. The primary goal is to control bleeding episodes, prevent complications, and maintain quality of life.

Treatment options include:

• Fresh whole blood or fresh frozen plasma (FFP) transfusions — the mainstay of acute bleeding management; these supply the missing clotting factors directly.
• Cryoprecipitate — a concentrated plasma product rich in Factor VIII, used specifically for haemophilia A.
• Desmopressin (DDAVP) — may be used in mild haemophilia A cases to stimulate release of stored Factor VIII.
• Wound management and pressure bandaging — to control external bleeding episodes.
• Avoidance of triggering procedures — elective surgeries should be planned carefully with pre- and post-operative plasma support.
• Restricted activity — limiting vigorous exercise reduces the risk of trauma-induced bleeding.

Gene therapy research in haemophilia B has shown promise in animal models, but this remains an area of ongoing scientific investigation and is not yet a routine clinical option.

For guidance on blood transfusion and plasma therapy for dogs, speak with the MaxPetz Delhi veterinary team.

When should you take a dog with suspected haemophilia to a vet?

Seek veterinary attention promptly if your dog shows any of the following. Do not wait to see if bleeding resolves on its own — delays can be dangerous in dogs with clotting disorders.

• Any wound that does not stop bleeding within 5 minutes of applying firm pressure
• Unexplained bruising or swelling, particularly around joints
• Blood in urine, faeces, or vomit on more than one occasion
• Nosebleeds lasting longer than 2–3 minutes
• Lethargy, pale or white gums, or rapid breathing following any bleeding episode
• A known family history of haemophilia in the dog's lineage — genetic screening is advisable before breeding
• Excessive bleeding observed after a routine vaccination or minor procedure

If your dog is already diagnosed with haemophilia, schedule a veterinary review at least every 3–6 months to monitor for anaemia, joint health, and overall condition, even between bleeding episodes.

How does MaxPetz Delhi support dogs with blood disorders?

MaxPetz in Delhi provides veterinary care for dogs with haemophilia and other canine blood disorders, combining diagnostic laboratory services with compassionate clinical management. The team is equipped to perform coagulation testing, administer plasma and blood products, and develop individualised long-term care plans for affected dogs.

What to expect at MaxPetz Delhi:

• Thorough coagulation workup including aPTT, PT, and factor-specific assays
• Access to blood product therapy including fresh frozen plasma and whole blood transfusion
• Tailored management plans to reduce bleeding episode frequency and severity
• Guidance for owners on home monitoring, activity restriction, and emergency protocols
• Cutting-edge veterinary technology combined with compassionate, patient-centred care

To discuss your dog's symptoms or arrange a diagnostic consultation, use the blood disorders veterinary service booking form on this page or contact the MaxPetz veterinary team directly.