What Is Purulent Discharge In Female Dogs?

What Is Purulent Discharge in Dogs?

Purulent discharge is a type of vaginal discharge in female dogs that contains pus. It has a thick, opaque, and yellowish or greenish appearance. The presence of purulent discharge usually indicates an infection or inflammation in the reproductive tract (Source).

Understanding purulent discharge is important, as it can be a common sign of potentially serious conditions like pyometra, a life-threatening uterine infection. Detecting and treating the cause of abnormal vaginal discharge can help prevent complications and ensure your dog’s health and comfort.


There are several conditions that can lead to purulent vaginal discharge in female dogs, including:

Pyometra: This is a serious bacterial infection of the uterus that causes pus to accumulate (source: https://wagwalking.com/condition/vaginal-discharge). It is most common in dogs who have not been spayed and usually develops a few weeks after a heat cycle. The pus causes a foul-smelling, creamy, yellowish discharge.

Urinary tract infections: Bacterial infections of the bladder or urethra can spread to the vagina and cause discharge containing pus and blood (source: https://www.petmd.com/dog/conditions/reproductive/vaginal-discharge-dogs). The discharge may be yellow, bloody, or cloudy.

Vaginitis: Inflammation and infection of the vagina often leads to purulent discharge. The most common cause is a bacterial infection (source: https://www.petplace.com/article/dogs/pet-health/vaginal-discharge-in-dogs). Discharge can be yellow, gray, or green.

Tumors/cancer: Tumors and cancer of the vagina, uterus, bladder, or urethra may cause bloody, pus-filled discharge in female dogs (source: https://wagwalking.com/condition/vaginal-discharge). This is more common in older, unspayed females.


The most common symptoms of purulent vaginal discharge in female dogs include:

Yellow or green discharge from the vagina – This type of discharge often indicates an infection or inflammation in the vagina or uterus. The yellow/green color comes from the presence of pus or white blood cells, which the body produces to fight infection. The discharge is often thick and may have an unpleasant odor.

Foul odor – Purulent discharge frequently has a foul, fishy smell due to the bacterial overgrowth and pus. This odor may be especially noticeable when the dog licks her vulva area.

Lethargy – Dogs with an internal uterine infection may act lethargic, depressed, and generally unwell. The infection makes them feel sick.

Loss of appetite – A dog with a significant uterine infection often loses her appetite and is disinterested in food. The illness suppresses her normal appetite.

In addition to vaginal discharge and odor, female dogs with a uterine infection may drink and urinate more frequently. They may lick or scoot their hind end along the ground. Some dogs exhibit signs of abdominal pain or sensitivity. Seek prompt veterinary care if your dog shows these symptoms along with vaginal discharge.


[1] https://vcahospitals.com/know-your-pet/pyometra-in-dogs

[2] https://www.petmd.com/dog/conditions/reproductive/vaginal-discharge-dogs


To diagnose the cause of purulent vaginal discharge in female dogs, the veterinarian will take a complete medical history and perform a physical exam. They will ask questions about the dog’s health, onset of symptoms, and whether the dog is spayed or intact. The physical exam allows the vet to assess the dog’s overall condition, feel the abdomen, and examine the vulva and vagina.

The vet will likely recommend several diagnostic tests to determine the cause of discharge, including:

Bloodwork – to check for signs of infection or other abnormalities (https://vcahospitals.com/know-your-pet/pyometra-in-dogs)

Urinalysis – examines the urine for bacteria, crystals, blood, etc.

Ultrasound – allows visualization of reproductive organs to check for masses or fluid accumulation

Biopsies – microscopic examination of tissue samples from the reproductive tract

These diagnostic tests along with the physical exam help the vet narrow down the possible causes and determine the best course of treatment.


The treatment for purulent discharge in female dogs depends on the underlying cause. If a bacterial infection is present, vets will typically prescribe antibiotics. Common antibiotics used to treat vaginal infections in dogs include amoxicillin, cephalexin, enrofloxacin, trimethoprim-sulfamethoxazole, clindamycin, and cefpodoxime. The choice of antibiotic depends on culture and sensitivity testing to determine which antibiotic will work best against the specific infection present.

Anti-inflammatories may also be prescribed to reduce inflammation and provide pain relief. Nonsteroidal anti-inflammatory drugs (NSAIDs) like carprofen, meloxicam, or aspirin are commonly used.

If the dog is dehydrated or septic from a severe infection like pyometra (infected uterus), she may need intravenous (IV) fluid therapy and hospitalization to stabilize her condition. Once stable, surgery is usually necessary to fully treat pyometra and prevent recurrence.


[Vaginal Discharge in Dogs – Symptoms, Causes …](https://wagwalking.com/condition/vaginal-discharge)

[Vaginitis in Dogs – VCA Animal Hospitals](https://vcahospitals.com/know-your-pet/vaginitis-in-dogs)


There are a few steps that can be taken to help prevent purulent vaginal discharge in female dogs:

Spaying your female dog is highly recommended to prevent recurring infections that can lead to vaginal discharge. Spaying removes the uterus and ovaries, eliminating heat cycles and the hormone changes that occur with them. This significantly reduces the risk of vaginal and uterine infections like pyometra, which is a common cause of vaginal discharge in intact older female dogs (PetMD).

Proper hygiene is also essential. The vulvar area should be gently cleaned with a warm, damp cloth when needed to remove any discharge and prevent irritation. Over-cleaning should be avoided as it can disrupt the natural flora and pH levels. Daily cleansing with gentle, pH balanced cleansers may be recommended by your veterinarian (VCA Hospitals).

Your dog should have an annual wellness exam with your veterinarian. They can monitor for early signs of infection and examine your dog during times she may be prone to vaginal infections, like during or after her heat cycle. Annual bloodwork can also check for underlying illnesses that could make infections more likely.


The prognosis for dogs with purulent vaginal discharge is generally good if prompt veterinary treatment is received (https://vcahospitals.com/know-your-pet/pyometra-in-dogs). Pyometra can be a life-threatening condition if left untreated, but most dogs make a full recovery after receiving appropriate medications and sometimes surgery.

However, the prognosis worsens if the pyometra is caused by an underlying condition like uterine cancer. Advanced or long-standing pyometra that leads to systemic illness or sepsis also carries a guarded prognosis (https://www.vet.cornell.edu/departments-centers-and-institutes/riney-canine-health-center/canine-health-information/pyometra). Close monitoring, supportive care, and prompt treatment are essential for the best outcome.

When to See a Vet

Any abnormal vaginal discharge in your dog warrants a veterinary visit. You should contact your vet immediately if you notice any of the following emergency symptoms in your dog:

  • Profuse, bloody, mucus-like, or pus-filled (purulent) vaginal discharge
  • Fever
  • Lethargy
  • Loss of appetite
  • Increased thirst and urination
  • Enlarged or painful abdomen
  • Vomiting
  • Diarrhea

These symptoms may indicate a serious condition like pyometra, which is a life-threatening infection of the uterus. Pyometra requires swift veterinary treatment, so take your dog to the vet right away if any of these signs are present (VCA Animal Hospitals).

At-home Care

If your female dog has a purulent vaginal discharge, there are some at-home care steps you can take while monitoring her condition or waiting for a vet appointment:

Keep the vaginal area clean by using unscented baby wipes to gently wipe away any discharge. Do not try to scrub or forcefully clean the area, as this can cause further irritation. Change bedding frequently to avoid contamination.

Check your dog for other symptoms like increased urination, blood in the urine, loss of appetite, lethargy or vomiting. Purulent discharge can indicate a more serious health issue. If other concerning symptoms develop, contact your vet right away.

Make sure your dog has easy access to fresh, clean water at all times to encourage hydration. Proper hydration supports vaginal health.

Feed your dog high-quality food and consider probiotic supplements to support immune health. A healthy diet helps fight infection.

Limit your dog’s activity level if the purulent discharge is frequent or profuse, as physical activity can worsen irritation.

While at-home care can provide some relief, purulent vaginal discharge signals an infection or medical issue needing veterinary attention. Closely monitor your dog and contact your vet if the discharge persists or gets worse.


In summary, purulent vaginal discharge in female dogs is usually a sign of infection or inflammation. Some common causes include urinary tract infections, vaginitis, and uterus infections like pyometra. Typical symptoms involve a yellow or green discharge with a foul odor. If the discharge is abnormal, take the dog to the vet right away for diagnosis and treatment. Tests like cultures and biopsies can help identify the underlying cause. Treatment depends on the specific infection, but may include antibiotics, antifungals, or surgery in severe cases. Prompt veterinary care is crucial, as some of these infections can become life-threatening if left untreated. But the prognosis is often good with appropriate treatment. While waiting for the vet appointment, keep the area clean using gentle wipes. Avoid letting the dog lick the region excessively. With quick diagnosis and proper care, most female dogs recover fully from purulent vaginal discharges.

The key is to have any abnormal discharge checked by a veterinarian as soon as possible. Though it may be alarming to see green or yellow discharge, try to stay calm and get the dog professional help right away. With prompt veterinary attention and proper treatment, many dogs go on to make a full recovery and live a happy, healthy life.

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