Vaginal Abnormalities in Dogs

Most symptoms will appear in young dogs especially around the first mating season.

• Difficulty or pain with mating
• Vaginal discharge
• Frequent licking of genitals
• Swollen or donut shape protrusion from the vulva
• Persistent vaginitis (vaginal infection)
• Positional incontinence (urine pooling in the vagina flows out when the dog changes positions)
• Passage of feces through the vulva
• Constipation

Types

These are the most common types of structural malformations in the vagina.

• Stricture or stenosis – a narrowing of the vaginal canal
• Septum – vertical partition dividing sections of the vagina
• Rectovaginal fistula – hole connecting the vagina and the rectum
• Vaginal prolapse or hyperplasia – vaginal material protruding from the vulva

Acquired conditions may be caused by

• Excessive mucosa development during estrus (Brachycephalic breeds, Labrador and Chesapeake Bay Retrievers, German Shepherd, Springer Spaniel, Walker Hound, Airedale Terrier, American Pitbull Terrier) 
• Recent surgery
• Injury or scarring in the vagina
• Long term inflammation (usually caused by injury and scarring)
• Cancer

The veterinarian will need to know your dog’s age, and whether she has been bred before. A detailed description of any symptoms will be helpful. Cellular cultures will be taken to identify infection, and determine what stage of the mating cycle your dog is in. Bloodwork is frequently normal, but urinalysis may show elevated levels of white blood cells from concurrent urinary tract infection. With rectovaginal fistula, the vaginal culture will show fecal contamination.

A physical examination will include palpitation and digital examination with an inserted finger. Many congenital structural abnormalities that are causing significant symptoms, especially vaginal septum, can be identified in this way. If no abnormalities are noted, Vaginoscopy (the insertion an instrument that can take a picture of the vagina), X-rays and ultrasound will help to identify abnormalities that are less obvious.

If the conditions isn’t causing a problem, most veterinarians don’t recommend treatment. With chronic symptoms of infection and incontinence, surgery is usually the best solution. Some problems directly related to breeding can be corrected with an ovariohysterectomy. Others may require surgical removal of the hymen membrane that is causing the problem. Dogs will typically stay in a veterinary hospital for at least a day and have a reduced period of activity when they come home. 

Rectovaginal fistulas also require surgery to correct the problem, especially if the dog also has an imperforate or obstructed anal canal which happens in many congenital cases. Diet change (usually a liquid diet) may be recommended until surgery can be performed. Dogs that have developed irreversible megacolon may need continued treatment to prevent constipation.

If the condition turns out to be cancerous, surgery will remove the tumor and chemotherapy may be prescribed to prevent metastasis. Further treatment may be needed if the cancer has spread to other parts of the body.