Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut elit tellus, luctus nec ullamcorper mattis, pulvinar dapibus leo.

Prostate Enlargement in Dogs

What Is Prostate Enlargement in Dogs?

Prostate enlargement in dogs refers to the swelling of the prostate gland, a crucial organ surrounding the urethra responsible for producing seminal fluid. Situated near the urethra’s origin from the bladder, the prostate plays a vital role in male dogs’ reproductive functions, akin to its role in human males.

Several factors can lead to prostate enlargement in dogs, including infections, growths, and other medical conditions. When the prostate becomes enlarged, it can exert pressure on nearby structures such as the urethra, bladder, and rectum, causing various complications. For instance, compression of the urethra can hinder urination, while pressure on the rectum may result in difficulty defecating. In intact (unneutered) male dogs, prostate enlargement can also impact fertility.

Importantly, not all cases of prostate enlargement are indicative of cancer. In fact, the majority of instances are benign, meaning they are not cancerous. Therefore, understanding the causes and implications of prostate enlargement is crucial for effective veterinary care and management of affected dogs.

Symptoms and Types

  • Difficulty or straining during urination or defecation
  • Increased frequency of urination
  • Presence of blood in the urine
  • Heightened thirst and increased drinking behavior
  • Abdominal pain, often leading to vocalization when pressure is applied to the abdomen

These signs can indicate potential prostate issues in dogs and should prompt veterinary evaluation and treatment to address the underlying causes and alleviate discomfort.


Various conditions contribute to prostate enlargement in dogs, including benign prostatic hyperplasia (BPH), prostatic infections (prostatitis), and prostate cancer.

Benign prostatic hyperplasia involves the enlargement of the prostate gland due to increased cell replication stimulated by male hormones. While BPH is a typical age-related change in intact male dogs, it can lead to complications if the prostate grows excessively or develops cysts, which may result in infection.

Benign prostatic hyperplasia predominantly affects intact male dogs, with breeds like Scottish Terriers, German Shepherds, and Doberman Pinschers being more predisposed to this condition.

Prostatic infections usually occur due to bacterial infiltration through the urethra into the prostate gland. Older intact male dogs with BPH are at higher risk of developing prostatitis. Large-breed dogs are more susceptible to prostate infections compared to small-breed dogs.

Prostate cancer can develop in both neutered and intact dogs, typically manifesting in older dogs, with diagnoses commonly occurring between 8.5 and 11 years of age. Breeds with a predisposition to prostate cancer include Bouvier des Flandres, Doberman Pinschers, Shetland Sheepdogs, Scottish Terriers, Beagles, Miniature Poodles, German Shorthaired Pointers, Airedale Terriers, and Norwegian Elkhounds. Early detection and veterinary care are crucial for managing prostate-related issues in dogs.


Veterinarians diagnose prostate enlargement in dogs through a series of diagnostic procedures:

Initially, the veterinarian conducts a thorough physical examination, which includes palpating the abdomen and performing a rectal exam to assess the size and condition of the prostate gland.

Blood tests are conducted to evaluate the overall health of the dog. Additionally, analyzing the urine and culturing it for bacteria helps in identifying potential prostate infections.

X-rays and ultrasound imaging of the abdomen provide detailed information about the size, shape, and presence of cysts in the prostate gland.

In cases where prostate infection is suspected, especially in intact dogs, the veterinarian may recommend evaluating the semen for signs of infection or conducting bacterial cultures.

For a conclusive diagnosis, the veterinarian may opt to collect a sample of prostate cells. This can be achieved using a needle with ultrasound guidance or through surgical biopsy, depending on the veterinarian’s preference and the specific case.

In instances where prostate cancer is suspected, a computed tomography (CT) scan may be advised to assess the extent of cancer spread and formulate an appropriate treatment plan.

These diagnostic measures enable veterinarians to accurately diagnose prostate enlargement in dogs and develop tailored treatment strategies to address the underlying causes and improve the dog’s quality of life.


The treatment approach for prostate enlargement in dogs varies depending on the underlying cause:

For dogs diagnosed with benign prostatic hyperplasia (BPH), neutering is typically recommended as the primary treatment. Neutering can lead to a significant reduction in prostate inflammation, with more than 50% improvement within three weeks and over 70% improvement within nine weeks. Alternatively, for breeding dogs or those at high anesthesia risk, long-term administration of oral medications like finasteride can effectively manage the condition.

In cases of prostate infection, antibiotic therapy is tailored based on urine culture results. Neutering may also be advised for dogs with an enlarged prostate, especially if the infection stems from benign prostatic hyperplasia. Antibiotics are usually prescribed for a duration of four to six weeks, with common choices including enrofloxacin, trimethoprim-sulfonamide (TMS), clindamycin, and erythromycin.

Prostate cancer in dogs often carries a high risk of metastasis (spreading to other parts of the body). Therefore, many pet owners prioritize maintaining their pet’s quality of life over aggressive treatment approaches. Dogs with evidence of metastases or advanced disease at the time of diagnosis may not be suitable candidates for curative treatments.

Treatment options for prostate cancer include:

  • Oral medications such as piroxicam, which help reduce inflammation and slow tumor growth
  • Chemotherapy
  • Radiation therapy
  • Surgical procedures to remove part or all of the prostate gland

Some treatments focus on alleviating obstructions. Specialty hospitals may offer procedures like urethral stent placement to aid in urination. Additionally, stool softeners like lactulose or polyethylene glycol (MiraLAX®) are often prescribed to manage constipation in affected dogs.

The choice of treatment depends on various factors including the dog’s overall health, the extent of the condition, and the pet owner’s preferences in consultation with the veterinarian.

Recovery and Management

The recovery and management of prostate enlargement in dogs depend on the underlying cause and the severity of the condition:

  • For dogs exhibiting symptoms of prostate enlargement attributed to benign prostatic hyperplasia (BPH), neutering is often curative. Dogs typically recover within a few weeks following the procedure.
  • Dogs diagnosed with a sudden onset of prostate infection usually respond well to antibiotic treatment without necessitating neutering. However, dogs with chronic prostate infections often require neutering for complete resolution of symptoms. Treatment duration for prostate infections typically spans one to two months. Dogs showing signs of fever and other symptoms may require short-term hospitalization for supportive care, including intravenous fluids, nutritional support, pain relief medications, and possibly a urinary catheter to ensure proper urine drainage. Antibiotics and other medications may be administered intravenously during hospitalization.
  • Dogs diagnosed with advanced prostate cancer typically face a grim prognosis if left untreated, with humane euthanasia often occurring within a month due to the severity of the disease. However, dogs receiving treatment such as oral medications, radiation therapy, and/or chemotherapy may have a prognosis extending to approximately seven months. Surgical intervention is generally not pursued for dogs with prostate cancer. Management focuses on ensuring comfort, alleviating pain, and facilitating normal urination and defecation.

Understanding the specific circumstances of the dog’s condition and implementing appropriate treatment and management strategies are crucial for optimizing recovery and quality of life.

Prostate Enlargement in Dogs FAQs

Is prostate enlargement considered a medical emergency in dogs?

Typically, prostate enlargement isn’t deemed a medical emergency in dogs. However, if your dog experiences symptoms such as vomiting, urinary retention, or lethargy, immediate veterinary attention is necessary. Urinary retention can lead to kidney complications, which may prove fatal if left untreated.

Scroll to Top