Dog UTI: Signs of a Urinary Tract Infection and What to Do

What it usually means

Most UTIs start when bacteria from the skin or gut travel up the urethra into the bladder and multiply. VCA notes that E. coli is the most common culprit. The Merck Veterinary Manual says female dogs are more likely to get urinary infections than males, largely because their urethra is shorter and wider. Puppies, older females, overweight dogs and dogs with a recessed vulva or other anatomical differences are also at higher risk.

Some UTIs are a sign of something else. Diabetes, kidney disease, Cushing's disease, bladder stones, incontinence and, less often, bladder tumors all make infections more likely, and may be the reason one keeps returning. Not every bout of frequent peeing is an infection either; stones, crystals, inflammation without bacteria and behavioral changes can look exactly the same, which is why testing a urine sample matters.

Signs of a UTI in dogs

The common signs are needing to go out often and passing only small amounts each time, squatting or lifting a leg repeatedly, straining, crying or whining while peeing, pink, red or cloudy urine, a strong smell, dribbling, licking at the genitals, and accidents in a dog that has been reliably house trained.

Some dogs show no signs at all, which Merck notes is especially common in dogs with diabetes, kidney disease or excess steroid hormones, so infections may only turn up on a routine urine test. If infection spreads up to the kidneys, signs can include fever, back or belly pain, vomiting, poor appetite, lethargy and increased thirst.

When to call your vet today

Call your vet the same day or the next if your dog is peeing more often, straining, has blood in its urine, is licking its genitals more than usual, or is having accidents. Collect a fresh urine sample in a clean container if you can and bring it within a couple of hours, kept in the fridge if there is any delay, though many vets prefer to collect their own sterile sample.

Call sooner if your dog has had UTIs before, has diabetes, kidney disease or Cushing's, is a puppy or a senior, or is also drinking more, off its food or tired. Repeated infections deserve a deeper look rather than another round of the same treatment.

When it's an emergency

Go to your vet or the nearest emergency vet immediately if your dog is straining to pee but little or nothing comes out, especially a male dog. A blocked urethra, often from a bladder stone, is life-threatening and can cause kidney damage and dangerous changes in blood potassium within a day or two.

Also seek emergency care for vomiting with urinary signs, a painful or swollen belly, a high fever, extreme lethargy, collapse, or large amounts of blood in the urine. These can mean a kidney infection, a blockage or another serious problem that needs prompt treatment.

What you can safely do at home

Give your dog easy access to fresh water and frequent chances to go outside; the more often the bladder is emptied, the better. Note how often it pees, how much comes out, the color, and any straining, and share that with your vet. Keep the fur around the genitals clean and trimmed in long-haired dogs, using clippers only if you are confident.

Do not give leftover antibiotics or human medicines, including pain relievers, which can be harmful to dogs and can make a urine culture unreliable. Cranberry products and supplements are not a substitute for diagnosis and treatment; ask your vet before giving any supplement for urinary health.

What the vet will likely check

Your vet will examine your dog and test a urine sample. A urinalysis checks concentration, glucose, blood, protein and pH, and looks under the microscope for white and red blood cells, bacteria and crystals. The most reliable sample is collected directly from the bladder with a fine needle, a quick procedure most dogs tolerate well. A urine culture and sensitivity test identifies the bacteria and which antibiotics will work.

Treatment is usually an antibiotic chosen by your vet, sometimes with pain relief, and the choice may change once culture results come back. Finish the full course even if your dog seems better. Your vet may recheck the urine afterward. Dogs with repeated infections may need blood tests, X-rays or ultrasound to look for stones, tumors, kidney disease or anatomical problems.

Prevention

Encourage your dog to drink and give regular toilet breaks rather than long gaps; a dog that holds urine for many hours gives bacteria time to grow. Keeping your dog at a healthy weight helps, especially for females with skin folds around the vulva. Keep the area clean, and dry it after swims or baths.

If your dog has an underlying condition such as diabetes or Cushing's, keeping it well controlled reduces infections. For dogs with recurring UTIs, ask your vet about prevention options, which may include a diet change or other measures based on what testing shows.

This page is general information, not veterinary advice, and it cannot replace an examination by the vet who knows your pet.