Blood in Dog Urine

Blood in urine (hematuria) can be caused by various reasons, such as urinary tract infections, bladder stones, prostate problems, or it can be caused by harmful substances such as rat poison. Find out some common and not-so-common causes of this canine illness symptom here.

Medically known as hematuria, blood in urine can be alarming to dog parents. Because there are a number of possible causes of this condition, it is advisable to learn more about the common causes as well as the other accompanying symptoms for each cause so that we are in a better position to deal with the situation.

Causes of Bloody Urine in Dogs

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Possible Causes of Blood in Dog Urine

  • Urinary Tract Infections

    Beagle Puppy One of the most common causes of bloody urine in dogs is urinary tract infections. UTIs occur more frequently in female dogs because they have a shorter urethra and bacteria can make their way up the urinary tract much easier. If your dog has UTI, she may urinate more frequently and may even be incontinent. She may strain while urinating and may have back pain and a fever.

  • Bladder or Kidney Stones

    Another common cause of blood in dog urine is bladder stones which are urinary mineral deposits that gather in the urinary tract and crystalize over time. They are most commonly found in the bladder, but can also be found in the entire urinary tract. In cases where the stones are very small like bits of gravel, these stones may be eliminated in the urine and may not cause too much pain to the dog, although you may see traces of blood in the dog's urine. Larger bladder stones can cause a dog to strain while urinating. The dog may need to urinate more frequently and sometimes there may be dribbling or even accidents in inappropriate places.

  • Yeast Infections

    Yeast infections (Candida) can be another cause of bloody urine in dogs, because Candida can cause bladder infections. Besides blood in urine, dogs with Candida will show other symptoms such as ear infections, digestive problems (e.g. flatulence, diarrhea, etc.), and skin irritations (e.g. eczema, hot spots, hives, etc.)

  • Prostate Problems

    If your male intact dog has blood in his urine, he may have a prostate problem, such as inflammation of the prostate caused by bacterial infection. When inflammation is present, blood will come at the end of urination rather than throughout urination. Urination may become more frequent and the dog may strain to urinate. The dog may also be feverish.

  • Trauma and Injuries

    Dogs with internal injuries may appear unhurt on the outside but may have blood in the urine. If your dog has recently had some kind of accident (e.g. hit by a car, a bad fall), he may have sustained internal injuries.

  • Poisoning

    Dogs that have ingested anti-coagulant rat poison (warfarin) suffer from blood-clotting problems which result in bloody urine. In addition, the dog will show other signs of poisoning, which include vomiting, diarrhea, and restlessness. Rat poisoning is an emergency which requires immediate veterinary attention.

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Less Common Causes of Blood in Dog Urine

Other less common causes of bloody dog urine include:

  • Cancer of the urinary tract (e.g. bladder cancer)
  • For male dogs, prostate cancer
  • Congenital urinary tract abnormalities
  • Some medications such as cyclophosphamide (a drug used to treat cancer and immune disorder)
  • Bleeding from the kidney of unknown cause


When to See a Vet

As you can see, all the causes of blood in dog urine are serious health conditions which require medical attention. If you see blood in your dog's urine, take him to the vet even though he may appear fine. A thorough examination including urinalysis, blood tests, and x-rays will be performed so that a proper diagnosis can be obtained and appropriate treatment can be given.

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