The most telling signs that your dog has a urinary tract infection are straining to pee, going out more frequently but producing only small amounts, and having accidents indoors despite being housetrained. You might also notice blood in the urine, a strong or foul smell, or your dog excessively licking their genital area. Any combination of these signs warrants a vet visit, because a UTI can’t be confirmed or properly treated at home.
The Six Key Signs to Watch For
UTIs in dogs produce a predictable cluster of symptoms. Some are easy to spot, others are subtle enough that you might chalk them up to a behavioral issue. Here’s what to look for:
- Straining to urinate. Your dog squats or lifts their leg and visibly pushes, sometimes producing very little urine or none at all.
- Frequent, small urinations. Instead of one or two normal bathroom trips, your dog asks to go out repeatedly and only passes a small amount each time.
- Accidents in the house. A previously housetrained dog who suddenly starts peeing indoors is a classic red flag. The urge hits fast and hard with a UTI, and they simply can’t hold it.
- Foul-smelling urine. A strong, unusually sour or ammonia-heavy smell can signal bacteria multiplying in the bladder.
- Excessive licking of the genital area. Dogs instinctively try to soothe discomfort. If you notice them licking more than usual, irritation or pain in the urinary tract is a common cause.
- Blood in the urine. This can range from a faint pink tinge to obviously red urine. It’s sometimes easier to spot on light-colored surfaces like concrete or puppy pads.
Not every dog shows all six signs. Some dogs display only one or two, especially early on. Indoor accidents or increased frequency alone are enough reason to call your vet.
Why Some Dogs Show No Symptoms at All
Some dogs carry bacteria in their bladder without showing any outward signs. This is called subclinical bacteriuria, and it’s more common than many owners realize. Your dog eats normally, plays normally, and pees on a regular schedule, yet a routine urine test picks up bacteria. Current veterinary guidelines generally recommend against treating these silent infections with antibiotics unless the dog has an underlying condition that puts them at risk for complications. The reasoning is that unnecessary antibiotic use can promote resistant bacteria without benefiting the dog.
This is one reason why routine wellness exams that include a urinalysis can catch problems you’d never notice on your own.
Which Dogs Are More Likely to Get UTIs
Female dogs get UTIs far more often than males. The anatomy is straightforward: females have a shorter, wider urethra, which gives bacteria an easier path from the outside world into the bladder. Male dogs aren’t immune, but their longer urethra provides more of a natural barrier.
Beyond sex, dogs with diabetes, Cushing’s disease, kidney disease, or weakened immune systems face higher UTI risk because their bodies are less efficient at fighting off bacteria. Older dogs and dogs on long-term steroid medications also tend to be more susceptible. If your dog falls into any of these categories and you notice even mild urinary changes, it’s worth getting a urine check sooner rather than later.
How Your Vet Confirms a UTI
Your vet will run a urinalysis, which examines a urine sample for bacteria, white blood cells, blood, protein, pH, and concentration. The sample is checked visually for cloudiness or color changes, tested with a chemical dipstick, and examined under a microscope to look for bacteria and inflammatory cells in the sediment. This full picture tells your vet whether infection is present and how the kidneys and bladder are functioning.
If your dog has recurring infections, your vet will likely send a sample for a urine culture. This identifies the exact type of bacteria involved and tests which antibiotics will work against it. Cultures take a couple of days to come back but are essential for choosing the right treatment when a dog keeps getting reinfected.
How to Collect a Urine Sample at Home
Your vet may ask you to bring in a sample, and it’s easier than it sounds. The goal is a mid-stream catch, meaning you let your dog start peeing, then slide a clean container into the stream. Morning urine works best because it’s the most concentrated and gives the clearest test results.
For dogs that squat, a flat container like an aluminum pie plate slid underneath works well. For leg-lifters, a cup or jar held in the stream does the job. If bending over your dog is awkward, tape a small container or ladle to a yardstick for extra reach. Wear disposable gloves, and don’t worry about collecting a huge volume. A tablespoon or two is plenty.
Transfer the sample to a clean container with a lid, label it with your dog’s name, and get it to your vet within a few hours. If that’s not possible, refrigerate it until you can drop it off. One important note: don’t mop up urine from the floor or grass after the fact. Samples picked up from surfaces will be contaminated with environmental bacteria and won’t give accurate results.
UTI vs. Bladder Stones
Bladder stones produce symptoms that look almost identical to a UTI: bloody urine, frequent urination, straining, and indoor accidents. Some dogs even have both at the same time, since stones can create a rough surface inside the bladder where bacteria thrive. The overlap makes it impossible to tell the difference at home based on behavior alone.
The distinction matters because bladder stones sometimes cause a urinary obstruction, blocking urine from leaving the bladder entirely. If your dog is straining hard and producing no urine at all, seems lethargic, vomits, or shows signs of abdominal pain, that’s a potential emergency. A complete blockage can lead to bladder rupture and is life-threatening without immediate treatment. Your vet can distinguish between a simple UTI and stones using imaging like X-rays or ultrasound alongside the urinalysis.
What Treatment Looks Like
A straightforward, first-time UTI is typically treated with a short course of oral antibiotics lasting 3 to 5 days. Your dog takes pills at home, and most dogs start feeling noticeably better within 48 hours. The most commonly prescribed first-choice antibiotic is amoxicillin, sometimes combined with a second ingredient to broaden its effectiveness. Stronger antibiotics are reserved for cases where testing shows resistance to the standard options.
Your vet may recommend a follow-up urinalysis after treatment to confirm the infection has cleared. This is especially important for dogs with recurring UTIs, underlying health conditions, or infections that didn’t respond quickly to the first round of medication. Recurrent infections (three or more in a 12-month period) often need a deeper workup to identify an underlying cause like bladder stones, anatomical abnormalities, or a systemic disease driving repeat infections.