A 1 year old male castrated ferret (Mustela putorius furo) presented to the Cornell University Hospital for Animals (CUHA) Emergency Service for urinary obstruction. The owners reported stranguria and urine dribbling the night before. The patient was taken to the primary care veterinarian where a single abdominal radiograph was obtained, which failed to find a cause for stranguria. The primary care veterinarian obtained a urine sample, which reportedly contained crystals and the patient was prescribed an unknown antibiotic. The patient remained stranguric and was presented to CUHA. On presentation, the patient was bright and alert. It was vocalizing and straining and had a large, firm bladder on abdominal palpation. Thoracic auscultation revealed bradycardia at 160 beats per minute (reference range: 200-250bpm), and a blood gas analysis results revealed hyperkalemia at 8.8 mEq/L (reference interval: 3.9-5.9 mEq/L). The patient was sedated for urethral catheterization and then hospitalized with a urinary collection system, intravenous fluids and pain medications. Abdominal radiographic images taken at CUHA revealed urinary calculi and a cystotomy was performed. A post-operative radiograph revealed subcutaneous edema and gas in the perianal area consistent with a urethral tear. The patient was hospitalized for supportive care, management of the urethral tear with a urinary catheter and frequent contrast urethrograms until the urethral tear was healed.