Dog Health
Urinary Tract Infection in Dogs: Symptoms, Diagnosis & Treatment
Published Last updated 3 min read
Quick answer
A urinary tract infection (UTI) in dogs causes frequent urination, straining, blood in urine, and accidents in house-trained dogs. Bacterial infections usually need antibiotics from your vet. Seek urgent care if your dog cannot urinate at all, appears in severe pain, or has lethargy and vomiting — these may signal a blocked urethra or kidney infection.
What is a UTI in dogs?
A UTI most often refers to bacterial cystitis — infection of the bladder. Bacteria typically ascend through the urethra, though kidney infections (pyelonephritis) and prostate infections can also occur, especially in intact male dogs.
UTIs are common but should never be ignored, particularly in puppies, seniors, and dogs with other health conditions.
Common causes and risk factors
- Anatomy — female dogs are more susceptible due to a shorter urethra
- Bladder stones — stones irritate the bladder lining and harbour bacteria
- Diabetes mellitus — sugar in urine promotes bacterial growth
- Cushing's disease — weakened immune defences
- Urinary incontinence — constant moisture around the urethra
- Recent catheterisation or surgery
Some dogs with UTIs have an underlying structural or metabolic problem that must be addressed to prevent recurrence.
Symptoms of a urinary tract infection
Watch for:
- Urinating more frequently in small amounts
- Straining or taking a long time to urinate
- Blood-tinged or cloudy urine
- Strong odour to urine
- Licking the genital area excessively
- Accidents in previously house-trained dogs
- Discomfort or crying when urinating
In kidney infections, dogs may also have fever, vomiting, back pain, and lethargy. Inability to pass any urine is an emergency — especially in male dogs, where a urethral obstruction can be life-threatening within hours.
Diagnosis and treatment
Your vet will perform a urinalysis and often a urine culture to identify the bacteria and the most effective antibiotic. Bloodwork and imaging (X-rays or ultrasound) may be recommended if stones or structural problems are suspected.
Treatment typically involves a course of antibiotics tailored to culture results when available. Pain relief may be added for comfort. Underlying conditions such as stones or diabetes must be managed concurrently.
Always complete the full antibiotic course. Recheck urinalysis may be advised to confirm the infection has cleared.
Prevention tips
- Provide constant access to fresh water to encourage regular urination
- Take dogs out frequently — holding urine too long may increase risk
- Keep the genital area clean, especially in dogs with long hair or incontinence
- Manage chronic conditions such as diabetes with your vet
- Address recurrent infections promptly with culture-based therapy
Sources & further reading
Facts in this guide are rewritten in plain English from publicly available UK advice. We name the organisation where a specific point comes from their guidance. Links below go to the original pages — use them to read the source material directly.
PETHEALTH+ is independent. These organisations do not sponsor, approve, or partner with this website. Guidance checked against sources listed below (last updated 2026-06-24).
Related guides
Frequently Asked Questions
- How can I tell if my dog has a UTI?
- Straining to urinate, frequent small amounts, blood-tinged urine, licking the genital area, and accidents indoors are common signs. Some dogs show no obvious symptoms until infection is advanced.
- Can a dog UTI go away on its own?
- Most bacterial UTIs require antibiotics prescribed by a vet. Untreated infections can spread to the kidneys or become recurrent and harder to treat.
- Are UTIs more common in female dogs?
- Yes. Female dogs have a shorter urethra, making it easier for bacteria to reach the bladder. Older dogs and those with diabetes or Cushing's disease are also at higher risk.
- What if my dog keeps getting UTIs?
- Recurrent UTIs warrant further investigation — urine culture, imaging, and checking for bladder stones, anatomical issues, or underlying disease such as diabetes.