A house-trained dog starts having accidents. It squats repeatedly on a walk and produces almost nothing. It licks at itself more than usual. Those three signs together point strongly at the lower urinary tract, and a urinary tract infection is the most common explanation.
What is actually happening
Bacteria — most often *E. coli* from the dog’s own gut flora — travel up the urethra and establish themselves in the bladder. Urine, which should be sterile, becomes an infected, inflamed environment.
The bladder wall becomes irritated, so it signals “full” when it is not. That is why the dog squats constantly and produces very little: the urge is real, the volume is not.
Signs
- Frequent urination in small amounts
- Straining, or an obviously prolonged effort
- Accidents indoors from a reliably house-trained dog
- Blood in the urine, ranging from pink tinge to obvious
- Strong or unusual smell
- Excessive licking of the genital area
- Discomfort: whining while urinating, restlessness, a hunched posture
- In more serious cases, fever, lethargy and loss of appetite
Who gets them
Female dogs, far more often. A shorter, wider urethra positioned closer to the anus means a much shorter journey for bacteria.
Dogs with predisposing conditions:
- Diabetes — glucose in urine feeds bacteria
- Cushing’s disease — immunosuppression and dilute urine
- Bladder stones — irritate the lining and harbour bacteria
- Kidney disease
- Anatomical issues such as a recessed vulva, which traps moisture
- Incontinence, which keeps the area damp
- Prostate disease in unneutered males
- Tumours or polyps in the bladder
Older dogs, in whom recurrent infections are much more likely to have an underlying cause.
Diagnosis
Do not accept treatment without a urine sample. This matters, because the signs of a UTI overlap almost entirely with bladder stones, crystals, tumours, and a syndrome of sterile inflammation that antibiotics will not touch.
Urinalysis looks at concentration, pH, protein, glucose, blood, white cells, bacteria and crystals.
Culture and sensitivity grows any bacteria present and tests which antibiotics will kill them. This is the gold standard, particularly for recurrent infections, and it is how antibiotic resistance is avoided.
Imaging — ultrasound or X-rays — looks for stones, thickened bladder walls and masses, especially in a dog with repeated infections.
Blood tests screen for diabetes, kidney disease and Cushing’s.
Treatment
A simple first infection in an otherwise healthy dog is usually treated with a short course of an appropriate antibiotic. Current veterinary guidance favours shorter courses than were traditional — often three to five days for a straightforward case.
Finish the course even once the dog seems better. Stopping early is a reliable way to breed resistant bacteria and a relapse.
Pain relief is often prescribed and makes a real difference to how quickly the dog is comfortable.
Recurrent or complicated infections need culture-guided treatment, a longer course, and investigation of the underlying cause. Treating the fourth UTI without asking why there was a first, second and third is how chronic problems develop.
Supporting recovery
Water, water, water. Dilute urine flushes bacteria and reduces irritation. Make drinking easy: multiple bowls, wet food, water added to dry food.
XIAZ Elevated Dog Bowl Stand
An older or arthritic dog often drinks less simply because bending is uncomfortable. Raising the bowl removes that barrier.
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More toilet opportunities. Urine sitting in the bladder for hours gives bacteria time to multiply. Take the dog out more often during treatment, and do not punish accidents — the dog has no control over them.
Hygiene. For dogs with skin folds around the vulva, or long coats that trap urine, keeping the area clean and dry helps considerably.
Earth Rated Dog Wipes
Unscented wipes for keeping the area clean in dogs prone to recurrent infections or with a recessed vulva. Dry the area afterwards; damp is the problem.
Keep them clean underneath. Trimming the coat around the vulva or prepuce in long-coated dogs reduces recurrence meaningfully.
Things that do not work
Cranberry. Widely recommended, weakly evidenced in dogs. It may have a modest role in prevention of recurrence in some cases but it does not treat an active infection.
Waiting it out. UTIs rarely clear on their own and can ascend to the kidneys, which is considerably more serious.
Apple cider vinegar and other home remedies. No evidence, and altering urine pH without knowing the crystal type can actively make stones worse.
Prevention, particularly for repeat offenders
- Free access to fresh water at all times
- Frequent toilet breaks — never make a dog hold it for eight or ten hours
- Manage any underlying condition properly
- Keep the dog at a healthy weight; obesity contributes to recessed vulvas and skin fold problems
- Keep the coat around the genitals trimmed
- Address incontinence rather than living with it — effective medication exists
- For dogs with a history of stones, follow the prescribed diet exactly
When to ring the vet
Same day for straining with blood, obvious pain, fever or lethargy. Immediately, out of hours, for a dog straining and producing nothing.
Otherwise, book an appointment and take a morning urine sample with you. It is a common problem with a straightforward fix, provided somebody actually looks at the urine.
This article is general information and not a substitute for veterinary advice.
