Urinary Tract Infections in Dogs and Cats
UTIs are common in both dogs and cats, especially females and senior pets. Learn the signs, treatment, and how to prevent recurring infections.
Urinary tract infections (UTIs) are one of the most common reasons pets visit the veterinarian. Bacteria enter the urinary tract and multiply, causing inflammation and discomfort. While UTIs are more common in female dogs due to their shorter urethra, they can affect any pet. Left untreated, UTIs can ascend to the kidneys and cause serious complications. Early recognition and proper treatment resolve most UTIs quickly.
Key Points
- Female dogs are most susceptible due to their shorter urethra
- Classic signs: frequent urination, straining, blood in urine, and accidents in the house
- Cats with UTIs may urinate outside the litter box or show signs of pain
- Most UTIs are treated with a 7-14 day course of antibiotics
- Recurring UTIs (3+ per year) may indicate an underlying condition requiring investigation
- Cranberry supplements may help prevent recurrence in dogs (evidence limited in cats)
Symptoms in Dogs vs Cats
In dogs: frequent small urinations, straining to urinate, blood in urine, licking the genital area, accidents in house-trained dogs, and strong-smelling urine. In cats: urinating outside the litter box, straining in the litter box, frequent visits to the litter box, blood in urine, and vocalizing during urination. Cats are especially prone to confusing UTI symptoms with feline idiopathic cystitis (FIC), which has similar symptoms but a different cause.
Diagnosis and Treatment
Diagnosis involves urinalysis (testing urine for bacteria, blood, crystals, and pH) and urine culture (growing bacteria to identify the specific type and which antibiotics will work). Most UTIs are treated with antibiotics for 7-14 days based on culture results. Always complete the full antibiotic course even if symptoms improve — stopping early promotes antibiotic resistance. Increased water intake helps flush bacteria from the urinary tract.
Recurring UTIs
If your pet has 3 or more UTIs in a year, further investigation is needed. Underlying causes may include: bladder stones (uroliths), anatomical abnormalities, diabetes mellitus, Cushing's disease, or immune deficiency. Imaging (X-rays, ultrasound) and blood tests can identify contributing factors. In some cases, long-term low-dose antibiotic prophylaxis or dietary changes may be recommended.
Prevention Strategies
Encourage frequent urination by providing ample opportunities to go outside (dogs) or keeping litter boxes clean (cats). Ensure fresh water is always available — increased water intake dilutes bacteria. For dogs prone to UTIs, wipe the genital area after outdoor walks. Cranberry extract supplements may help prevent bacterial adhesion in the urinary tract (evidence is stronger in dogs than cats). Regular vet checkups can catch early infections before they become serious.
When to See a Vet Immediately
- Your pet is urinating frequently but only passing small amounts
- You notice blood in your pet's urine
- Your pet is straining to urinate or seems to be in pain
- Your house-trained pet is having accidents indoors
- Your cat is urinating outside the litter box
- Your pet has had multiple UTIs in the past year
How RVC Can Help
Royal Veterinary Center provides comprehensive urinary care including urinalysis, urine culture and sensitivity testing, bladder ultrasound, and treatment for UTIs and bladder stones. For recurring infections, we investigate underlying causes and create long-term prevention plans. Our in-house laboratory provides same-day urinalysis results. Call +853 6677 6611 if your pet shows urinary symptoms.
This article is for educational purposes only and does not replace professional veterinary advice. If your pet is showing any symptoms, please contact Royal Veterinary Center immediately at +853 6677 6611.