TL;DR: Blood or dark-colored urine in dogs is always a serious sign that requires urgent veterinary evaluation to rule out conditions like infections, bladder stones, or life-threatening toxin ingestion.
What are the common causes of dark or bloody urine in my dog?
Finding blood in your dog's urine (hematuria) or noticing a dark, tea-colored, or orange tint can be very alarming. These changes typically signify the presence of red blood cells, hemoglobin, or bilirubin. While some causes are manageable, others can be life-threatening, including:
- Urinary tract infections (UTI)
- Bladder stones or internal trauma
- Clotting disorders
- Ingestion of toxins like rat poison
When is bloody urine in dogs considered a veterinary emergency?
- The urgency level for dark or bloody urine is High; blood in the urine is never normal and often indicates significant pain or internal dysfunction.
- Seek immediate emergency veterinary care if your dog is also straining to urinate, lethargic, has pale gums, or is vomiting.
- Do not wait for the symptoms to resolve on their own, as underlying conditions can progress rapidly.
Why should I take a photo of my dog's urine for the vet?
- Take a clear photo of the urine on a light-colored surface like a puppy pad, concrete, or snow to provide the veterinary team with an objective look at color and concentration.
- A visual helps the triage nurse determine how quickly your dog needs to be seen based on the presence of clots or specific discoloration.
- Visual evidence assists the veterinarian in narrowing down whether the issue is originating from the kidneys, bladder, or a systemic blood issue.
Clinical Context (Merck Veterinary Manual)
In dogs presenting with dark or bloody urine, initial diagnostics should include a thorough physical examination and urinalysis, evaluating color, turbidity, occult blood, and presence of hematuria. Urinalysis may reveal evidence of secondary infection and neoplastic cells. Additional diagnostics may include a complete blood count, blood gas analysis, blood pressure assessment, urine protein:creatinine ratio, abdominal radiographs, abdominal ultrasonography, and contrast studies of the urinary tract. For bladder tumors, the veterinary bladder tumor antigen test may be helpful, although false positives can occur. A cystourethrogram, retrograde urethrogram, or ultrasonography may be necessary to determine the location and extent of masses.
Chapter: Urology
Source: The Merck Veterinary Manual, 11th Edition (Page 1494)