Anticoagulant rodenticide toxicosis causing tracheal collapse in 4 small breed dogs

To describe 4 cases of tracheal narrowing attributed to tracheal mucosal hemorrhage caused by anticoagulant rodenticide toxicity in breeds predisposed to tracheal collapse.

Over the years 2005-2014, 4 dogs were presented for respiratory distress secondary to diffuse tracheal narrowing. All dogs had possible anticoagulant rodenticide ingestion and prolonged prothrombin time. All dogs received fresh-frozen plasma transfusions, vitamin K₁ supplementation, and supportive care. Tracheal narrowing improved on follow-up radiographs in 3 of 4 patients. One of 4 did not have follow-up radiographs performed. All dogs survived.

Anticoagulant rodenticide toxicity causing clinical signs consistent with tracheal collapse is a rare but recognized phenomenon that has not been previously reported in breeds prone to tracheal collapse.