Vaginal Hyperplasia in Dogs: Causes, Signs & Treatments

Vaginal hyperplasia in dogs is a condition driven by estrogen where the soft tissue surrounding the vagina becomes overly swollen during the heat cycle of female dogs. This swelling can be so extreme that it visibly protrudes from the vulva, sometimes resembling a ring-shaped mass. Knowing about this condition helps you spot symptoms early and get your dog treated promptly, ensuring her comfort and well-being.

Breeds Most Susceptible to Vaginal Hyperplasia

Although any female dog can develop vaginal hyperplasia, certain breeds are more prone due to genetics and tissue composition. Large, intact breeds experiencing heat cycles are particularly vulnerable. South African Boerboel puppies are frequently affected, alongside other robust breeds common in the U.S. Some additional breeds at risk include:

• Labrador Retriever puppies
• Chesapeake Bay Retriever puppies
• German Shepherd puppies
• English Springer Spaniels
• Walker Hounds (commonly known in the U.S. as Treeing Walker Coonhounds)
• Airedale Terrier puppies

Symptoms to Look For

Vaginal hyperplasia manifests in three levels of severity, with signs varying accordingly:

• Type 1: Mild swelling causing slight vaginal tissue protrusion, mostly contained within the vulva.
• Type 2: More noticeable swelling with tissue extending visibly outside the vulva.
• Type 3: Severe swelling producing a distinct ring-shaped mass protruding from the vulva.

Additional signs may include persistent licking of the vaginal area, discomfort or pain during urination (dysuria), and reluctance to breed. Carefully observe your dog during heats, especially if she belongs to breeds that are higher risk.

Underlying Causes and Risk Factors

The primary cause is an exaggerated reaction to increased estrogen levels during the proestrus and estrus phases of the heat cycle. The hormone surge triggers the vaginal tissue to swell excessively. There may also be a genetic predisposition in certain females. In extreme cases, this condition can lead to vaginal prolapse, which complicates urination and increases the risk of infection or tissue damage.

How Veterinarians Diagnose Vaginal Hyperplasia

Diagnosis is typically straightforward through a physical exam, as the swelling and tissue protrusion are quite noticeable. Veterinarians assess the severity to determine the best course of action. They also rule out other conditions like vaginal tumors, clitoral hypertrophy, or true prolapses as part of their evaluation.

Treatment Options Available Today

Care for vaginal hyperplasia aims to shield the exposed tissue while encouraging healing and preventing infections or injury:

• Conservative Management: Maintaining cleanliness of the affected area and protecting it with gentle topical ointments is often the first step.
• Preventing Self-Harm: An Elizabethan collar (cone) is used to stop licking or biting that could worsen the condition.
• Medication: Some veterinarians administer hormonal therapies, such as synthetic GnRH or progesterone agents, to induce ovulation or reduce estrogen effects and decrease swelling.
• Surgical Intervention: In serious or prolonged cases, manual repositioning and suturing of the tissue might be attempted, albeit with discomfort and a chance of recurrence. For frequent or severe occurrences, spaying (ovariohysterectomy) is recommended to remove hormonal triggers and prevent future problems.

Because vaginal hyperplasia can come back, spaying your dog afterward greatly reduces the likelihood of recurrence. Prompt treatment also lowers the chances of complications like tissue injury or infections.

Encouraging Responsible Pet Care

If your dog is from a breed more prone to vaginal hyperplasia, being informed will help you act swiftly. Regular veterinary exams during reproductive phases and early spaying if breeding isn’t planned responsibly protect your pet’s health. Ethical breeding choices further help decrease the prevalence of inherited reproductive issues.