An 8-year-old 43-kg (94.6-lb) castrated male Labrador Retriever was evaluated at the University of Georgia Veterinary Teaching Hospital because of stranguria of 4 days’ duration. The dog was only able to expel a few drops of urine after straining for a prolonged time, although the urine produced was normal in appearance. The dog had no other notable medical history.
Clinical and Gross Findings
When the dog was first presented to the referring veterinarian, no abnormalities were identified on physical examination, and the results of routine hematologic and serum biochemical analyses were unremarkable. A urinary catheter was placed to allow