Dogs with UTI often urinate more or less often than they previously have, as well as whimper while urinating. Oftentimes, dogs show no symptoms of UTI.
Some dogs will experience pain with a UTI and will yelp or whimper while urinating. Other signs that your dog may have a UTI is possible weight loss, vomiting and anorexia. Be advised that not all UTI's in dogs will show symptoms. It's always best to consult your dog's vet.
The most common symptom of a urinary tract infection in dogs is frequent urination or inappropriate urination (wetting in the house when otherwise properly housetrained). A simple urinalysis can diagnose an infection and antibiotics are usually curative.
If you suspect a UTI in your dog it is very important that you take the dog to the vet. Symptoms can include frequent urination or the dog hesitating to urinate.
Likely UTI symptoms in dogs would include: frequent urination (or less urination, stopping all together), weight loss, vomiting, dehydration, foul odor or blood in urine.
The best way to detect a UTI in dogs is to know your dog's behavior. Obvious signs like blood indicate a problem, but changes in behavior signal a problem also.