Puppy vaginitis (also called juvenile vaginitis) is inflammation of the vagina in a puppy that has not reached puberty. In contrast, adult-onset vaginitis affects some spayed female dogs. The cause of either form of vaginitis is not well understood, but it is usually a mild condition that is easily treatable.
Young female dogs who have not had their first heat cycle are at risk for puppy vaginitis.
The condition does not seem to occur in any particular breed of dog. Symptoms can show up in puppies as young as 6 to 8 weeks.
Female dogs who have been spayed may contract adult-onset vaginitis. Again, there is no breed predisposition and it can occur at any age.
Veterinarians are not entirely sure what causes vaginitis, though there are some factors that may play a role in it. For example, your dog may have a urinary tract infection or a chemical imbalance in her urine that leads to an abundance of pH.
It's also possible that the puppy's vagina has too much yeast or that she was born with an abnormality in her vagina. Feces contamination is a possible cause because some dogs have a habit of licking the area. Foreign objects and vaginal injury may also cause vaginitis and these cases may become chronic.
Vaginitis can occur in dogs with certain medical conditions as well. Diabetes and liver disease are two of the most common and these may exacerbate vaginitis symptoms, especially in older dogs.
Signs and Symptoms
Uncomplicated puppy vaginitis has few signs. It is often discovered incidentally during a veterinary checkup. Signs are typically mild, may come and go, and can include:
- Vaginal discharge that is mucous-like, white to yellow, and usually not heavy
- Licking the vulva; some dogs may also scoot on the floor if it's irritating them
- Mild irritation of skin around the vulva
In puppies, if there are additional signs, such as frequent urination, it may be a health issue other than puppy vaginitis. For adult dogs, frequent urination or incontinence may be an additional sign of vaginitis, though this can also be due to another issue.
The symptoms and age of the pup strongly suggest the diagnosis. A vaginoscopy offers a visual examination of the inner walls of the vagina that will reveal a reddened surface. A sample of cells from the vagina examined under the microscope will show changes typical for puppy vaginitis as well.
Your vet may want to do other tests to rule out other conditions that may need treatment. For example, they may take a urine sample to check for a urinary tract infection. A swab of the vagina can be used to check for unusual amounts or types of bacteria that indicate a bacterial infection requiring antibiotic therapy. Other tests may also be recommended by your vet.
The good news is that puppy vaginitis is typically self-treated. It's very common for it to clear up on its own after the dog goes into heat for the first time. Experts are divided on the question of whether to spay pups with puppy vaginitis before their first heat cycle or let them go through a cycle.
This is a question you should discuss with your vet.
In mild cases with no complicating factors such as infections, treatment usually consists of daily cleaning of the vulva. This can be done with an unscented baby wipe or an alcohol-free ear cleaning solution. The goal is to keep the area clean and alleviate any irritation from the discharge.
Antibiotics are often only necessary if tests for bacteria reveal a higher than normal or unusual population of bacteria. Typically, only adult dogs are prescribed antibiotics if the vet is concerned that it may not clear up on its own.
If your vet found another medical issue along with vaginitis, that will likely need to be treated first. In many cases, these treatments will take care of the vaginitis as well.
The daily cleaning of the vulva is typically all that is needed until the condition resolves on its own.
However, it is important to check with your vet if you notice changes in the nature of the discharge or if any other symptoms appear.
Memon MA. Vaginitis in Small Animals. Merck Veterinary Manual. 2018.