Some greyhounds may have excessive bleeding following trauma or surgery. The cause for the bleeding is not known; blood clotting parameters are normal and the Von Willebrand’s Factor (a clotting abnormality) is negative in most of these dogs. This bleeding may occur up to 4 days post surgery, so it is important to monitor your greyhound carefully following a surgery (including dentals) or trauma. Make sure that your veterinarian is aware of this and has a drug called Amicar (aminocaproic acid) available following surgery. Even dentals with extractions can trigger this disorder.