TL;DR: Preputial discharge in male cats often indicates infection or inflammation and requires a vet visit within 24 to 48 hours, unless the cat is straining to urinate, which is a life-threatening emergency.
What is preputial discharge in cats and what are the common causes?
- Preputial discharge is any fluid—such as pus, blood, or mucus—exiting the prepuce, which is the skin covering a male cat's penis.
- Visible discharge often indicates inflammation (balanoposthitis), a urinary tract infection, or local trauma.
- Monitoring the color of the fluid (clear, yellow, green, or bloody) is important as it provides clues about the severity of the irritation.
When should I treat my cat's preputial discharge as a veterinary emergency?
- Medium Urgency: If your cat is behaving normally, eating, and drinking, schedule a veterinary appointment within 24 to 48 hours.
- High Emergency: If the discharge is accompanied by straining to urinate, vocalizing in the litter box, or an inability to pass urine, seek immediate emergency care.
- Male cats are prone to life-threatening urinary blockages, making these specific symptoms a critical medical priority.
How does taking a photo of the discharge assist with my cat's triage?
- Providing a clear, well-lit photograph allows the medical team to see the exact color and consistency of the fluid.
- A photo helps the vet check for signs of swelling or tissue damage without having to disturb the cat further.
- This visual aid helps determine how quickly your cat needs to be seen and prepares the team for specific diagnostic tests.
Clinical Context (Merck Veterinary Manual)
Balanoposthitis, while rare in cats, can manifest as a preputial discharge. Diagnostic evaluation should include a thorough examination of the penis and prepuce, up to the level of the fornix, to identify underlying predisposing factors such as trauma, lacerations, neoplasia, or foreign bodies. Saline infusion through a rigid endoscope or an otoscope can facilitate this examination, potentially requiring sedation or general anesthesia. Preputial cytology may be helpful, and bacterial cultures, although challenging to interpret due to normal preputial flora, may identify unusual organisms and guide antibiotic selection in refractory cases. Treatment involves correcting any predisposing factors, clipping long hair from the preputial orifice, and thoroughly flushing the preputial cavity with a mild antiseptic (e.g., dilute povidone-iodine or chlorhexidine) or sterile saline solution.
Chapter: Urology, Infectious Disease
Source: The Merck Veterinary Manual, 11th Edition (Page 1401)