Dog UTI Symptoms: Signs, Causes & Treatment

Urinary tract infections in dogs are painful and, if left untreated, can spread to the kidneys. Here's how to recognize the signs and get your dog the right treatment.

Classic UTI Symptoms

Frequent urination of small amounts, straining to urinate, blood in urine (pink-tinged or red), licking the genital area excessively, foul-smelling urine, accidents in the house from a previously housetrained dog, and crying or whining when urinating. These symptoms overlap with bladder stones, tumors, and prostate issues in males — which is why a vet visit is essential.

How Vets Diagnose a UTI

Urinalysis (fresh sample): checks for bacteria, white blood cells, red blood cells, pH, and crystals. Urine culture and sensitivity: identifies the specific bacteria and which antibiotics will work. Gold standard but takes 2-3 days. Abdominal X-rays or ultrasound: to rule out bladder stones or tumors. Blood work: if kidney involvement is suspected, especially in older dogs.

Treatment

Antibiotics based on culture results — typically 7-14 days. Common choices: amoxicillin, amoxicillin-clavulanate (Clavamox), enrofloxacin (Baytril), or cephalexin. Complete the full course even if symptoms improve. Recheck urinalysis after treatment to confirm infection is cleared. Recurrent UTIs need further investigation — underlying cause must be found.

What Causes Recurrent UTIs

Anatomical abnormalities, bladder stones, diabetes, Cushing's disease, immunosuppression, incomplete emptying of bladder, prostate disease in males, and antibiotic resistance.

Home Care and Prevention

Encourage frequent urination (don't make your dog hold it all day), provide fresh water at all times, regular walks allow full bladder emptying, cranberry supplements (limited evidence but low risk), and hygiene: keep the genital area clean. For female dogs, wipe front-to-back after walks.

When It's an Emergency

Inability to urinate at all (straining with nothing coming out), extreme lethargy + UTI symptoms, blood clots in urine, vomiting + UTI symptoms. These suggest a urinary obstruction or kidney infection — go to the emergency vet.