Polyuria (Increased Urination) In Dogs: Symptoms, Causes, & Treatments

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Polyuria in dogs is an abnormal increase in urine, which can result in more frequent urination, a higher volume of urine expelled during urination, or both. This condition often appears with polydipsia, which is an increase in thirst and water intake. Polyuria can be a sign of many medical issues in dogs that range from mild to quite serious. There are three types of polyuria. Physiological polyuria is a normal reaction to increased water consumption, which can be a behavioral problem. Pharmacological polyuria results from increased salt ingestion or medications that increase urination, such as diuretics or steroids. Pathological polyuria is due to metabolic problems like kidney failure. If your dog is urinating more than usual, consult your veterinarian so they can diagnose any underlying causes and prescribe treatment. Here is what you should know about the symptoms, causes, and treatments for polyuria in dogs.

Symptoms Of Polyuria In Dogs

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Polyuria is, itself, a symptom of other underlying conditions in dogs. It is often accompanied by polydipsia, or increased thirst and water consumption. You may notice your dog needing to go out to urinate more frequently or having accidents in places they don’t normally urinate. It is important to take note of how much your dog drinks and urinates regularly when no medical issues are present to establish a baseline. That way, you can tell when something is out of the ordinary and report it to your veterinarian. Your vet may ask you to take a urine sample for testing to determine the cause of the increased urination.

Causes Of Polyuria In Dogs

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There are many, many possible causes of polyuria in dogs. It is a non-specific symptom that can apply to several medical conditions that range from mild to serious. Most of the time when other symptoms are not present, it isn’t a great concern, and your veterinarian will be able to let you know for sure if that is the case. Do not assume, though, that if you ignore the condition, it will go away. Symptoms may worsen, and a serious medical condition can be present. Always rely on your veterinarian for a proper diagnosis. Here are some of the possible conditions that can cause polyuria in dogs.

  • Diabetes
  • Renal (kidney) disease or failure
  • Liver disease or failure
  • Electrolyte imbalance
  • Low protein diets
  • Exposure to diuretics, steroids, or other medications
  • Hypercalcemia
  • Hepatitis
  • Cushing’s disease
  • Addison’s disease
  • Hormonal imbalance
  • Hypokalemia
  • Leptospirosis
  • Hyperthyroidism
  • Infection of the uterus
  • Tumors
  • Bladder infection
  • Bladder stones
  • Prostate issues
  • Pregnancy
  • Territorial marking (mostly if another animal is present)

Treatments For Polyuria In Dogs

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Treatment for polyuria in dogs varies greatly depending on the underlying cause, but you should never limit your dog’s water intake unless your veterinarian instructs you to do so. This can often make symptoms of the causative medical condition worse. Sometimes veterinarians will prescribe limiting water intake, but this is only in certain cases and should only be done with veterinary approval.

If an infection is present, antibiotics may be prescribed. Hormone imbalances usually require long-term treatment with hormone replacements. Diabetes is managed with insulin and changes in diet and exercise. Chemotherapy may be used to treat cancer, and kidney disease is often treated with medication, diet changes, dialysis, or a combination of treatments. Your veterinarian will advise you on the appropriate treatment for the underlying condition that is causing polyuria in your dog.