What Is Benign Prostatic Hyperplasia?

Benign Prostatic Hyperplasia — commonly known as BPH — is one of the most frequent health concerns affecting middle-aged and older male dogs. In fact, up to 80% of unneutered male dogs over the age of five will develop some degree of BPH in their lifetime. Despite how common it is, many owners are unaware of the condition until their dog begins showing worrying symptoms.

Fortunately, BPH is treatable, and with timely veterinary care, most dogs recover quickly and comfortably. This article will help you understand what BPH is, why it happens, how it’s diagnosed, and what treatment and home care involve.

What Is Benign Prostatic Hyperplasia?

BPH is an enlargement of the prostate gland, a small but important gland located within the dog’s pelvis. The prostate surrounds the urethra — the tube that carries urine from the bladder to the outside — and sits just below the rectum.

The prostate’s role is to produce the fluid that nourishes and transports sperm. Its size and function depend heavily on hormones, especially androgens such as testosterone. When hormone levels change or become imbalanced (something that naturally occurs in unneutered male dogs as they age), the prostate gland begins to enlarge.

Unlike prostate cancer, BPH is not malignant — but it can cause significant discomfort and health complications.

Why Does BPH Occur?

The primary cause of BPH is hormonal influence, particularly from testosterone produced by the testicles.

As dogs age, hormonal shifts stimulate the prostate to grow. This growth is not due to infection or cancer — simply hormonal overstimulation. Dogs undergoing testosterone therapy for other health issues can also develop BPH as a side effect.

Because the condition is hormonally driven, BPH is rare in neutered male dogs and almost never seen in cats.

Signs & Symptoms of BPH in Dogs

As the prostate enlarges, it can press against surrounding structures:

• Pressure on the rectum can make bowel movements difficult

• Narrowing of the urethra can make urination painful or incomplete

Common symptoms include:

• Constipation or difficulty passing stool

• Straining to urinate

• Frequent urination in small amounts

• Blood in the urine or semen

• Painful urination

• Abdominal discomfort

• Weight loss

• A swollen or “potbelly” appearance caused by an enlarged bladder

Some dogs may appear lethargic or uncomfortable, while others quietly struggle with elimination.

If your dog shows any of these signs, prompt veterinary care is important.

Diagnosing BPH

Your veterinarian may begin with a rectal examination, which often reveals a uniformly enlarged prostate. To confirm the diagnosis and rule out other prostate diseases, one or more of the following may be performed:

• Blood tests

• Urinalysis

• Abdominal X-rays

• Ultrasound imaging

• Urine culture

• Microscopic examination of prostatic fluid

Diagnosis is usually straightforward, and determining the correct cause is essential for successful treatment.

Treatment: Why Castration Is the Best Option

The most effective and recommended treatment for benign prostatic hyperplasia is castration (surgical removal of the testicles). Neutering removes the primary source of androgens, which immediately stops the hormonal stimulation responsible for prostate enlargement.

What to expect after castration:

• The prostate begins shrinking within a few days

• Significant improvement is often seen within 1–2 weeks

• Urination and defecation become easier as pressure decreases

• Long-term recurrence is unlikely

If a testicular tumour is contributing to hormonal imbalance, castration also removes the source of abnormal hormone production.

Supportive treatments may be recommended during recovery, such as:

• Laxatives or stool softeners

• Enemas

• Anti-inflammatory medication

• Manual bladder emptying (for severe cases)

• Specialised nutrition to support healthy aging

Home Care After Treatment

Your dog’s recovery requires attentive home care to ensure healing is smooth and comfortable.

Monitor Elimination

Watch your dog’s urination and bowel movements closely. Improvement should be steady, but contact your veterinarian immediately if:

• Straining persists

• No urine is produced

• Constipation continues

• Your dog seems uncomfortable

Monitor Appetite, Water Intake, and Behaviour

A recovering dog should gradually return to normal eating and drinking. If appetite drops or behaviour becomes unusual, call your veterinarian.

Check the Surgical Incision Daily

Look for:

• Redness or swelling

• Bleeding

• Discharge

• Opening of the incision

• Excessive licking or chewing

If your dog bothers the incision, a cone or protective collar is usually necessary.

Limit Activity

For the first week, restrict exercise to gentle leash-walking only. No jumping, running, or rough play until your veterinarian confirms healing.

Give Medications Exactly as Prescribed

Even if your dog seems better, complete the full course of medication. If administering medication becomes difficult, contact your vet — never skip doses.

Follow-Up Appointments

Sutures are typically removed according to your veterinarian’s schedule. Follow-up visits ensure the prostate is shrinking and recovery is on track.

Nutrition After Treatment: Why Diet Matters

Middle-aged and older dogs benefit greatly from balanced, age-appropriate nutrition — especially when recovering from a hormonal condition like BPH.

The right diet helps:

• Maintain ideal body weight

• Support organ function

• Avoid excessive sodium, phosphorus, protein, and calories

• Support overall healthy aging

Your veterinarian may recommend foods such as:

• Hill’s Science Diet Mature Adult Active Longevity™

• Hill’s Science Diet Mature Adult Large Breed

• Hill’s Prescription Diet g/d® Early Cardiac & Healthy Aging

• Hill’s Prescription Diet k/d® Renal Health

Transitioning to a New Diet

Switch your dog’s food gradually over 7 days:

1. Mix a small portion of the new food with the old

2. Increase the amount of new food daily

3. By day 7, feed only the new food

If your dog is reluctant:

• Warm canned food slightly

• Add warm water to dry kibble (wait 10 minutes before feeding)

• Hand-feed for the first few days

Consistency is key — proper nutrition supports treatment success.

Final Thoughts

Benign Prostatic Hyperplasia is common, uncomfortable, and progressive — but it is also highly treatable. With early diagnosis, castration, and good postoperative care, most dogs make a full and happy recovery.

If your male dog is unneutered and over the age of five, or if you’ve noticed changes in urination or bowel habits, speak to your veterinarian. Understanding BPH and acting early can dramatically improve your dog’s comfort, health, and quality of life.

Your dog depends on you — and with the right care, you can help him enjoy many more healthy, active years.