Von Willebrand's Disease in Welsh Springer Spaniels: The Clotting Problem That Hides Until It Doesn't

Von Willebrand factor is a protein that helps platelets stick together and to damaged blood vessel walls, forming the initial plug that stops bleeding before the rest of the clotting cascade finishes the job. A dog with reduced levels of this protein still clots reasonably well during ordinary daily bumps and scrapes, since minor everyday injuries don't demand much from this specific part of the clotting system.

The problem becomes visible under real bleeding stress: surgery, a deep cut, or trauma significant enough to require the full clotting cascade working efficiently from the start. This is why von Willebrand's disease so often reveals itself for the first time during something as routine as a spay or neuter procedure, when an owner and vet alike may have had no prior reason to suspect anything was wrong.

Signs that can appear even outside of surgery include prolonged bleeding from minor cuts or nail trims, occasional nosebleeds without an obvious cause, or bleeding gums during teething or dental work that seems to go on longer than expected. None of these signs are dramatic on their own, which is part of why the condition often isn't suspected until a bigger bleeding event forces the question.

If you think your Welsh 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 hip dysplasia, ear infections, epilepsy.

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.