An 8-year-old female spayed Dachshund weighing 7.45 kg was presented to the University of Tennessee Veterinary Medical Center with a large, firm, bilaterally symmetrical, painful protrusion in the perineal region that had appeared acutely 2 days before presentation. The dog had a one-month history of dysuria and pollakiuria that was suspected to be a urinary tract infection; when the dog did not respond to amoxicillin-clavulanic acid, a free catch urine sample was submitted for culture. A few colonies of a Staphylococcus organism were grown from the culture, and treatment was changed to marbofloxacin. The dog also had a 2-day history of tenesmus associated with the appearance of the perineal protrusion. The dog had been spayed 2 years prior to presentation after multiple types of unsuccessful breeding