Have noticed your puppy licking its vulva constantly, increased frequency of urinations or having a difficult time house-breaking? If so, your puppy may have a condition called puppy vaginitis. Puppy vaginitis is a common occurrence in female dogs less than a year of age and in this article, we will discuss what puppy vaginitis is, how to recognize its symptoms, and what treatment options are available. We hope that with this information you’ll be able to provide your pup with the care they need if they experience any signs of puppy vaginitis.

What is puppy vaginitis?

Puppy vaginitis, also known as prepubertal or juvenile vaginitis, is a common condition that affects young female puppies under one year of age. The exact cause of this condition remains unclear, but it is believed to be linked to the immaturity of the puppy's vaginal wall.

Dogs with severe puppy vaginitis often have urine with either high acidity or high alkalinity, and may also have food allergies, even if they don't have a urinary tract infection. Very alkaline or acidic urine can be very irritating to the vaginal tissues. In one study of 37 cases, 84% resolved with no treatment.

How is puppy vaginitis diagnosed?

There are no definitive tests for puppy vaginitis specifically, and is often a diagnosis of exclusion, which means that other causes must be ruled out first. Your veterinarian will take a detailed medical history and perform a physical examination of your puppy to determine if puppy vaginitis is the likely cause.

In almost all cases, a urinalysis +/- urine culture should be performed. Symptoms of puppy vaginitis can resemble those of a urinary tract infection (UTI) and a urinalysis can help to rule out an infection. Additionally, your veterinarian may perform other tests such as a vaginal swab or cytology to further support the diagnosis.

How is puppy vaginitis treated?

Puppy vaginitis typically resolves on its own once the puppy goes through her first heat cycle or after spaying (ovariohysterectomy). However, there is limited scientific evidence to determine whether spaying at different ages impacts this resolution. In the meantime, there are several helpful strategies to manage your puppy's condition:

  1. Diet adjustment: Modifying your puppy's diet to change her urine pH can help alleviate discomfort. Your veterinarian can guide you in making appropriate dietary changes.
  2. Pain management: Until the issue resolves, your veterinarian may recommend pain relief measures to keep your puppy comfortable.
  3. Maintaining cleanliness: If your puppy has excessive discharge without other symptoms, you can use fragrance-free baby wipes to gently clean the area and keep it hygienic.
  4. Probiotics: Giving your puppy a high-quality, multi-strain probiotic can support her overall health by promoting a healthy immune system and maintaining a balanced microbiome.

Veterinarians typically avoid prescribing antibiotics to treat puppy vaginitis due to the self-resolving nature of the condition and the potential risks associated with early antibiotic exposure. 

In some cases, early antibiotic exposure may permanently prevent the development of a healthy, balanced microbiome. Additionally, research has shown that early antibiotic use can increase the risk of obesity, asthma, and other immune-related health issues later in life.

Please remember to always consult with your veterinarian for personalized advice and recommendations to ensure the best care for your pets.


Puppy vaginitis is a common condition in young female puppies, but the exact cause remains unclear. Symptoms can often be mistaken for those of urinary tract infections and it's important to rule out other causes before making a diagnosis. Treatment usually involves modifying your puppy’s diet, providing pain relief measures and maintaining cleanliness around their vulva area with fragrance-free baby wipes. Antibiotics should only be used as a last resort due to the potential risks associated with early antibiotic exposure. If you suspect that your puppy may have puppy vaginitis, consult with your veterinarian for personalized advice and recommendations on how best to care for them.