Urinary

Urinary problems in dogs: when to see a veterinarian

Urinary issues in dogs range from simple infections to more complex conditions. Early evaluation helps prevent complications.

When should I worry?

Seek veterinary care if your dog is straining to urinate, producing only small amounts, if there is blood in the urine, if urination seems painful, or if your dog is frequently urinating without producing much urine. If your dog is unable to urinate at all, see a veterinarian immediately.

Common urinary conditions in dogs

Urinary Tract Infection

Urinary tract infections are one of the most common causes of urinary signs in dogs and are typically diagnosed with a urinalysis.

A urinary tract infection (UTI) occurs when bacteria enter and colonize the urinary tract. Signs include frequent urination, straining to urinate, blood in the urine, and urinating in unusual places. Female dogs are more commonly affected due to their shorter urethra.

Diagnosis is typically made through urinalysis and urine culture. A urine culture identifies the specific bacteria present and determines which antibiotics are most effective, helping to avoid unnecessary or ineffective treatment. Your veterinarian will prescribe appropriate medication based on the culture results.

Bladder Inflammation

Cystitis is inflammation of the bladder that can occur with or without a bacterial infection.

Cystitis refers to inflammation of the bladder. It can be caused by bacterial infection, bladder stones, polyps, or idiopathic (unknown) causes. In some cases, particularly in younger female dogs, cystitis may occur without a detectable bacterial infection — a condition sometimes called sterile cystitis.

Signs are similar to those of a UTI and include increased frequency of urination, straining, and blood in the urine. Diagnostic testing — including urinalysis, urine culture, and potentially imaging — helps determine the underlying cause and guide appropriate treatment.

Bladder Stones

Bladder stones form when minerals in the urine crystallize and can cause irritation, pain, and obstruction.

Bladder stones (uroliths) develop when minerals such as struvite or calcium oxalate accumulate in the bladder. They can range from tiny grains to large, smooth stones and may irritate the bladder lining, causing blood in the urine, pain, and frequent urination.

Stones are typically detected through X-rays or ultrasound. Some types of stones can be dissolved with prescription diets, while others require surgical removal. Your veterinarian will determine the best approach based on the type and size of the stones and the severity of the dog's condition.

Kidney Disease

Kidney disease can affect urination patterns and is an important cause of increased thirst and urination in older dogs.

Chronic kidney disease is common in aging dogs and can lead to increased urination and thirst. As kidney function declines, the organs lose their ability to concentrate urine, leading to dilute urine production and more frequent urination.

Blood work (including BUN, creatinine, and SDMA) and urinalysis are essential for evaluating kidney function. Early detection allows for dietary and medical management that can slow progression and improve quality of life. Kidney disease requires ongoing monitoring and management.

Prostate-Related Disease

In intact male dogs, prostate conditions can contribute to urinary difficulty and changes in urination patterns.

The prostate gland surrounds the urethra in male dogs, so enlargement or inflammation of the prostate can interfere with normal urination. Common prostate conditions include benign prostatic hyperplasia (BPH), prostatitis (infection), and prostatic cysts.

Signs may include difficulty urinating, blood in the urine, and unusual discharge. Diagnosis typically involves rectal examination and imaging. Many prostate conditions in intact male dogs can be managed with medication, and neutering often resolves or prevents certain prostate-related issues.

Obstruction Risk

A complete inability to urinate is a medical emergency that requires immediate veterinary intervention.

While complete urinary obstruction is more common in cats, dogs can also experience urethral blockage due to bladder stones, strictures, or prostate enlargement. A dog that is straining desperately to urinate but producing no urine — or only drops — should be seen by a veterinarian immediately.

Urinary obstruction leads to a dangerous buildup of toxins in the blood and can cause bladder rupture if not addressed promptly. Emergency stabilization typically involves relieving the obstruction and stabilizing the dog's condition, followed by treatment of the underlying cause.

Diagnostic Testing

A combination of urinalysis, blood work, and imaging helps identify the cause of urinary problems in dogs.

Urinalysis is the cornerstone of urinary tract evaluation. It assesses urine concentration, pH, and the presence of blood, bacteria, crystals, and abnormal cells. A urine culture identifies specific bacteria and their antibiotic sensitivities.

Blood work evaluates kidney function and overall health. X-rays and ultrasound allow visualization of the bladder, kidneys, and urethra to check for stones, masses, or structural abnormalities. Together, these diagnostics provide a complete picture and guide targeted treatment.

How a veterinarian may evaluate this

Your veterinarian will begin by discussing your dog's symptoms — when they started, how often your dog is urinating, whether there is blood, and whether there has been any change in water consumption. A physical examination, including palpation of the abdomen and bladder, is typically performed.

A urinalysis is usually the first diagnostic step, often collected as a free-catch sample or via cystocentesis (a needle collection directly from the bladder) for a more accurate culture. Additional diagnostics such as blood work, X-rays, or ultrasound may be recommended based on initial findings to develop a clear picture of the underlying cause.