Excessive Urination in Dogs

The causes and treatments of a dog’s excessive urinating.

CAUSES OF EXCESSIVE URINATION (polyuria)

Endocrine disorders: Hyperadrenocorticism (Cushing’s disease), hyperthyroidism, diabetes mellitus, diabetes insipidus, pyometra, or secondary hyperparathyroidism.

Non-infectious/Acquired diseases: Kidney disease or liver disease.

Infectious diseases: Leptospirosis, cystitis (inflammation/infection of the bladder, usually causing frequent urination), or pyelonephritis (kidney infection, usually bacterial).

Toxicity: Ethylene glycol (antifreeze), chocolate, cholecalciferol (rodenticide), organophosphates (frequent urination), calcipotriene (human psoriasis medication), vitamin D, aminoglycoside antibiotics, or amphotericin B (antibiotic).

Congenital/Inherited disorders: Primary parathyroid hyperplasia (in German Shepherd Dogs), portosystemic shunt, renal dysplasia/hypoplasia (abnormal kidney development; in Miniature Schnauzers, Alaskan Malamutes, Cocker Spaniels, Doberman Pinschers, Lhasa Apsos, and many other breeds), chronic hepatitis (Doberman Pinschers), or hepatic amyloidosis (Shar-Pei).

Drug reactions: Glucocorticoids or phenobarbital.

Tumors: In pituitary, liver, adrenal glands, anal sacs (when accompanied by paraneoplastic syndrome), or malignant lymphoma.

Miscellaneous disorders: Paraneoplastic syndrome (if accompanied by hypercalcemia) or polycythemia (abnormal increase in red blood cells, either primary or secondary to another disease).

What to do: Increased urination may or may not be an emergency, depending on the cause, duration, and presence of other symptoms. Contact your veterinarian or emergency clinic immediately for specific advice about your dog’s situation.

Disclaimer: DogChannel.com’s Dog Medical Conditions are intended for educational purposes only. They are not meant to replace the expertise and experience of a professional veterinarian. Do not use the information presented here to make decisions about your dog’s ailment. If you notice changes in your dog’s health or behavior, please take your pet to the nearest veterinarian or an emergency pet clinic as soon as possible.

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susan   bakersfield, California

11/13/2014 8:30:20 AM

my dog was treated over the weekend for a bacterial infection she is home form her stay at the vet and taking antibiotics and on a bland diet but now is is very thirsty and urinating too frequently is this a side effect from the medication?

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Tina Hunter   Harvest, AL

7/5/2014 4:17:01 PM

My dog, Lily, Sheppard/Chow mix has experienced weight gain since Feb 2014. Recently she is excessively drinking and urinating. Today I am finding blood in her urine. She is 7 years old and is on phenobarbital for seizures. Being a holiday weekend, her vet is closed. We are very worried about her, but as most people, we are tight on money. I will be taking her to her vet on Monday. She does not seem to be in any pain or uncomfortable, but I am curious to some answers. I have been reading it could be kidney/liver problems to diabetes. Can any one give me any answers to what we are dealing with?

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yvonne   corryton, Tennessee

5/20/2013 6:03:11 AM

my female just had large litter & now is peeing in house large amounts . any opinions?

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fran   dunnellon, Florida

3/25/2013 10:40:25 AM

I have a 10 yr old female mini dachshund who drinks a lot and urinates often. She goes out pees and comes in and pees in her crate. I a at my wits end...Any ideas?

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