TL;DR: Foul-smelling vulvar discharge in dogs is a high-priority emergency that may indicate a life-threatening uterine infection called Pyometra. Seek immediate veterinary care to prevent sepsis and potential death, especially if your dog is not spayed.
What are the symptoms and common causes of vulvar discharge in dogs?
Discharge from a female dog's vulva refers to any fluid—ranging from clear and watery to thick, bloody, or pus-like—emanating from the reproductive tract. While some discharge is a normal part of a heat cycle, a foul or pungent odor is almost always a sign of a bacterial infection. Common causes include vaginitis, severe urinary tract infections, or a dangerous uterine infection called Pyometra.
Is foul-smelling vulvar discharge a veterinary emergency for my dog?
- The urgency level for foul-smelling discharge is High.
- If your dog is not spayed, this symptom is a hallmark of Pyometra, a life-threatening condition where the uterus fills with pus.
- Without immediate surgical intervention, the uterus can rupture, leading to sepsis and death.
- Even in spayed dogs, a foul odor indicates a significant infection that requires prompt antibiotic therapy and diagnostic testing to prevent the spread of bacteria to the kidneys or bloodstream.
How can taking a photo of my dog's discharge help with the veterinary triage process?
- Taking a clear, well-lit photo of the discharge and the vulvar area can be vital for your veterinarian's triage process.
- Dogs often lick themselves clean, which can hide the severity of the issue from the clinical team.
- A photo provides a permanent record of the color, consistency, and volume of the discharge, helping the vet quickly determine the severity of the infection and prioritize your dog's care the moment you arrive at the clinic.
Clinical Context (Merck Veterinary Manual)
In dogs, a foul-smelling purulent vulvar discharge, often containing blood, can be a sign of pyometra when the cervix is open. Other signs include lethargy, anorexia, polyuria, polydipsia, and vomiting. If the cervix is closed, there may be no discharge, but abdominal distention may be present due to an enlarged uterus. These signs can progress rapidly to shock and death, warranting emergency intervention. Physical examination may reveal dehydration and uterine enlargement. While fever is not always present, leukocytosis with neutrophilia and a left shift are common, although leukopenia can be present in animals with sepsis.
Chapter: Reproductive, Urology
Source: The Merck Veterinary Manual, 11th Edition (Page 1398)