Von Willebrand's Disease: A Bleeding Disorder That Hides Until It Doesn't

Von Willebrand factor is a protein that helps platelets stick together and adhere to damaged blood vessel walls, an early and critical step in forming a stable clot. In von Willebrand's disease, this protein is deficient or doesn't function normally, which means the initial clotting response to any blood vessel injury is impaired. Day-to-day life rarely puts enough stress on this specific clotting step to reveal a problem — minor bumps and scrapes generally heal fine, since the body has some redundancy in its clotting mechanisms. It's specifically larger vascular trauma — surgery, a significant injury, or even something like a dental cleaning that nicks gum tissue — that exposes the underlying deficiency, sometimes dramatically.

This is exactly why so many cases are discovered unexpectedly during a routine spay or neuter, rather than through any symptom an owner would have noticed beforehand. A dog can appear completely normal, energetic, and healthy right up until that first significant surgical or traumatic bleeding challenge, at which point excessive, hard-to-control bleeding reveals a condition that had been present, invisibly, the dog's entire life.

The entire value of testing for this condition comes from knowing about it before a bleeding event happens, rather than discovering it during one.

If you think your Pug has von willebrand's disease, the plan is three steps: write down what you have seen and when it started, book a veterinary appointment rather than waiting for the next flare, and take video of the behaviour or symptom before you go — the thing you are worried about rarely happens in the consulting room. Screening in the parents covers brachycephalic airway syndrome (boas), pug dog encephalitis, corneal ulcers.

What the vet visit should produce is a diagnosis and a written plan, not just reassurance: what is being ruled out, what the monitoring interval is, and which signs mean you come back sooner. Ask what the treatment costs across a year rather than per visit, because that is the number that decides whether you are managing this condition or reacting to it.

Between appointments, keep a short log — dates, what you saw, what changed. It is the single most useful thing an owner brings to a follow-up, and for von willebrand's disease it is often what separates a clear pattern from a guess.