Von Willebrand Disease in Dogs: What to Know Before Surgery

If your dog needs surgery, whether it's a spay, a dental cleaning, or something more involved, you need to know whether they can clot blood normally. Von Willebrand disease (vWD) is the most common inherited bleeding disorder in dogs, and in Cypress, TX, I see it most often in Dobermans, German Shepherds, Poodles, and Shetland Sheepdogs. At Hearthstone Animal Clinic, we test for this condition before any procedure where bleeding is expected, because catching it beforehand changes everything about how we approach surgery.

What is von Willebrand disease in dogs?

Von Willebrand disease is a clotting disorder caused by a deficiency or defect in von Willebrand factor (vWF), a protein that helps platelets stick together and form clots. Without enough functional vWF, even minor injuries or routine surgeries can lead to prolonged, sometimes life-threatening bleeding.

Think of it this way: platelets are like bricks, and von Willebrand factor is the mortar. You can have plenty of bricks, but without mortar, the wall falls apart. Dogs with vWD have normal platelet counts on routine bloodwork, which is why this condition gets missed if you're not specifically looking for it.

The three types of vWD

• Type 1: The most common form. Dogs produce von Willebrand factor, but not enough of it. Most affected dogs have mild to moderate bleeding tendencies. Dobermans, Corgis, and German Shepherds typically have this type.
• Type 2: Dogs produce vWF, but it doesn't function properly. Less common, seen primarily in German Shorthaired Pointers and German Wirehaired Pointers.
• Type 3: The most severe form. Dogs produce little to no von Willebrand factor. Scottish Terriers, Shetland Sheepdogs, and some Dutch Kooikerhondjes are predisposed. These dogs can bleed spontaneously.

Which breeds are most at risk?

Von Willebrand disease has been documented in over 50 breeds, but some are affected at much higher rates. If your dog is on this list, testing before any surgical procedure is not optional in my practice.

• Doberman Pinschers: Up to 70% carry the gene for Type 1 vWD. This is the single most commonly affected breed.
• German Shepherds
• Standard Poodles
• Shetland Sheepdogs
• Golden Retrievers
• Pembroke Welsh Corgis
• Bernese Mountain Dogs
• Scottish Terriers
• German Shorthaired Pointers

Mixed-breed dogs with ancestry from any of these breeds can also be affected. If you adopted a rescue and don't know the full history, I'd rather test and know than find out during a crisis.

What are the signs of a bleeding disorder?

Many dogs with von Willebrand disease show no obvious symptoms in daily life. The bleeding tendency often only becomes apparent during surgery, trauma, or heat cycles. That's what makes it dangerous: the first sign can be a surgical complication.

Signs that warrant testing

• Prolonged bleeding from minor cuts or nail trims
• Excessive bleeding during heat cycles
• Nosebleeds without obvious cause
• Blood in urine or stool without infection or other explanation
• Bruising easily (look for purple or red spots on the gums, belly, or inner ear flaps)
• Prolonged bleeding after losing baby teeth

If your puppy bled more than expected when their teeth fell out, that's a red flag. Most owners don't think much of it at the time, but it's worth mentioning before any scheduled procedure.

How is von Willebrand disease diagnosed?

Standard bloodwork (a CBC and chemistry panel) will not detect von Willebrand disease. Platelet counts are usually normal. The clotting times measured on routine pre-anesthetic panels often look fine too, because those tests measure different parts of the clotting cascade.

The right test

To diagnose vWD, we need a von Willebrand factor antigen test, which measures the actual amount of vWF in your dog's blood. This is a send-out test that goes to a specialized lab. Results typically take 3-5 business days and cost between $75 and $150 depending on the lab.

For breeding dogs or definitive diagnosis, genetic (DNA) testing is available for many at-risk breeds. This tells you whether your dog is clear, a carrier, or affected. Companies like the Veterinary Genetics Laboratory at VetGen offer breed-specific vWD panels.

When to test

I recommend testing any at-risk breed before their first surgical procedure, which usually means before spaying or neutering. For dogs with a known family history of bleeding problems, testing should happen as soon as you're establishing care. If you're considering a laparoscopic spay or any elective surgery for your dog, this is the time to discuss screening.

What happens if my dog has vWD and needs surgery?

Having von Willebrand disease doesn't mean your dog can never have surgery. It means we plan differently. That planning is the difference between a routine outcome and an emergency.

How we adjust for affected dogs

• Blood typing and crossmatching in case a transfusion becomes necessary
• Fresh frozen plasma or cryoprecipitate may be given before surgery to temporarily boost von Willebrand factor levels
• Desmopressin (DDAVP) can be administered 30 minutes before surgery in some Type 1 cases to release stored vWF from blood vessel walls
• Surgical technique modifications: more careful hemostasis, use of electrocautery, topical clotting agents, and extended monitoring afterward
• Avoiding certain medications: NSAIDs and some other drugs can impair platelet function further

For severe Type 3 dogs, elective procedures may need to be reconsidered entirely, or performed only at facilities with immediate access to blood products. If your dog has Type 3 vWD and needs emergency surgery, we'll coordinate with emergency hospitals in the Houston area that maintain blood banks.

Can von Willebrand disease be treated or cured?

There is no cure for von Willebrand disease. It's a genetic condition that stays with your dog for life. But with proper management, most affected dogs live normal lifespans.

Day-to-day management

• Avoid trauma when possible. This doesn't mean wrapping your dog in bubble wrap, but it does mean thinking twice about activities with high injury risk.
• Use caution with nail trims. Have styptic powder on hand. Better yet, let us do it so we're prepared if bleeding is prolonged.
• Inform any veterinarian or emergency clinic about the diagnosis before treatment. I recommend keeping a note in your wallet or phone.
• Avoid medications that affect clotting (aspirin, ibuprofen, many NSAIDs) unless directed by your veterinarian.

Dogs with mild Type 1 disease often go their entire lives with no significant bleeding episodes, as long as surgeries are planned appropriately. The danger is not knowing.

When to see your veterinarian urgently

If your dog has been diagnosed with vWD, or if you suspect a bleeding disorder, contact your veterinarian or an emergency clinic immediately if you notice:

• Bleeding that won't stop with direct pressure after 10-15 minutes
• Pale gums, weakness, or collapse
• Blood in vomit, stool, or urine
• Large or spreading bruises
• Swelling in a joint after minor activity (bleeding into joints is rare but serious)

For routine questions about pre-surgical bloodwork or whether your breed should be screened, that can wait for a scheduled appointment. But active bleeding in a dog you know has a clotting disorder is an emergency.

What I tell my clients with at-risk breeds

If this was my Doberman or my Sheltie, I would test before the first surgery, no exceptions. The test costs less than one bag of IV fluids during an emergency transfusion. It takes five days. And it gives me information that could save my dog's life.

The instinct to skip testing is understandable: "my dog seems fine, why borrow trouble?" But von Willebrand disease doesn't announce itself. Dogs with vWD look healthy, act healthy, and bleed normally from tiny scratches. It's the surgical incision or the tooth extraction that reveals the problem, and by then you're managing a crisis instead of preventing one.

If you have questions about von Willebrand disease, your dog's breed risk, or what bloodwork makes sense before an upcoming procedure, I'm happy to talk it through. You can schedule a visit at Hearthstone Animal Clinic or reach us at (281) 859-9244. Here in Cypress, TX, we'd rather have the conversation now than during surgery.