Blood in Your Dog’s Urine — Urgency Guide by Cause

UrinarySymptomsMeongsiljang Veterinary Advisory Board

Blood in your dog’s urine can stem from various causes, including cystitis, urinary stones, prostate disease, or tumors, and some cases are emergencies requiring treatment within 24 hours. Quickly assess the urgency by observing the urine color, urination behavior, and any systemic symptoms.

For Dog Hematuria, a Vet Visit Is Always the Answer

A veterinarian performing an ultrasound examination of a puppy’s bladder

Hematuria in dogs is a urinary tract symptom where red blood cells or hemoglobin mix with urine, giving it a pink, red, or brown appearance. There are clear criteria for emergency care within 24 hours. If your dog is unable to urinate at all, has pale gums, or experiences vomiting and lethargy, immediate veterinary attention is necessary. Additionally, it is safer to have your dog examined within 24 to 48 hours rather than waiting for spontaneous recovery, as the causes can range from simple cystitis to stones, tumors, or systemic bleeding disorders.

Assess Initial Urgency by Urine Color

Urine color is the quickest clue to narrow down the cause. The darker and more brownish the color, the higher the urgency. Check the table below to see where your pet’s urine color falls. However, since color alone cannot confirm a diagnosis, please use this as a reference and be sure to visit a veterinarian.

Urgency by Urine Color and Accompanying Symptoms

Item	Pink/light red	Bright red	Brown/cola-colored
Presumed cause	Cystitis, early-stage stones	Hemorrhagic cystitis, stones, tumor	Hemoglobinuria, myoglobinuria, poisoning
Accompanying symptoms	Frequent urination/dribbling urination	Pain/repeated small-volume urination	Lethargy/jaundice/vomiting
Urgency	Within 24–48 hours	Same-day visit recommended	🚨 Emergency room immediately
Priority home measures	Provide plenty of water, photograph the urine	Provide water, avoid going out	Minimize movement and leave immediately

Color can also change from food, medication, or beet intake. Don't jump to conclusions—use this only as a reference.

Symptom Checklist to Check at Home

To narrow down the cause, we need to look at other symptoms that appear alongside hematuria. If your pet exhibits two or more of the following signs, we recommend seeking veterinary care within 24 hours.

Frequent urination: Going to the bathroom more than 2–3 times within an hour.

Straining with little output: Assuming the urination posture but passing only a very small amount of urine.

Vocalizing or trembling during urination: Whining or shaking while in the urination posture.

Excessive licking: Repeatedly licking the genital or urethral area.

Decreased appetite: Eating less than half of their usual food intake.

Abdominal pain: Tensing up or avoiding touch when the abdomen is palpated.

Lethargy: Refusing walks or sleeping significantly more than usual.

A dog holding a urination posture during a walk

🚨 7 Signs Requiring Immediate Emergency Care

If any of the following apply, do not delay—take your pet to a 24-hour veterinary clinic immediately. 1. No urination for more than 12 hours (suspected urinary obstruction) 2. Brown or cola-colored urine (hemoglobinuria, possible red blood cell destruction) 3. Pale or yellowish gums and tongue 4. Repeated vomiting and inability to drink water 5. A hard, distended abdomen 6. Lethargy, disorientation, or unsteady gait 7. Known or suspected ingestion of onions, grapes, rat poison, or other toxic substances

How Do the Causes Differ?

The causes of hematuria can be broadly categorized into five main groups. The treatment approach and recovery time vary significantly depending on the underlying cause.

Bacterial cystitis: This is one of the most common causes. It is often accompanied by frequent urination and straining. If a bacterial infection is confirmed through urinalysis and urine culture, antibiotic treatment is necessary.

Urinary tract stones: These present with frequent urination and pain. If the urethra becomes obstructed, emergency surgery may be required.

Prostate disease: This is common in intact male dogs and can manifest as prostate enlargement, prostatitis, or abscesses, causing discomfort during both urination and defecation.

Tumors: In senior dogs, there is a possibility of transitional cell carcinoma (TCC) in the bladder or urethra.

Systemic bleeding disorders: These include immune-mediated thrombocytopenia, anticoagulant rodenticide (vitamin K deficiency) poisoning, and pyometra (in female dogs).

In particular, if hematuria persists in senior dogs despite 1 to 2 weeks of antibiotic treatment, further diagnostic testing for tumors is necessary.

A dog urine sample collected at the veterinary clinic for urinalysis

Diagnostic Steps at the Veterinary Clinic

Diagnosing hematuria typically follows a stepwise approach. Knowing what to expect in advance can help you make informed decisions about consent and costs.

Step 1 — Urinalysis and Urine Sediment Examination: Checks for red blood cells, bacteria, and crystals; results available within 30 minutes.

Step 2 — Urine Culture: Determines the appropriate antibiotic; takes 3–5 days.

Step 3 — Abdominal Ultrasound: Evaluates the bladder, stones, tumors, prostate, and uterus.

Step 4 — Blood Tests: Assesses kidney function (BUN, creatinine, SDMA), anemia, and platelet levels.

Step 5 — CT Scan or Biopsy: Performed if a tumor is suspected.

If stones are suspected, an X-ray is also performed to assess their location and size.

Female and Intact Dogs Require Additional Caution

If a female puppy shows bloody urine along with purulent discharge from the vulva, abdominal distension, and excessive thirst and urination, pyometra is a possibility. This is an emergency condition that can lead to death from sepsis if it progresses, so immediate veterinary care is necessary. In unneutered male puppies, bloody urine can result from prostate enlargement, prostatitis, or a prostatic abscess. If pain during defecation and weakness in the hind legs occur together, a digital rectal exam and prostate ultrasound are needed.

Prevention and Daily Management Tips to Prevent Recurrence

Hematuria has a high recurrence rate once it occurs. Prevention and management are key, especially for stones and cystitis.

Adequate water intake: At least 50–60 ml per kg of body weight daily

Appropriate urination intervals: Provide outdoor walks or indoor litter boxes to avoid holding urine for more than 8 hours

Adherence to prescription diet: Do not switch back to regular food without veterinary guidance after a stone diagnosis

Urinalysis 1–2 times per year: For pets aged 7 and older, include urinalysis and abdominal ultrasound in regular health checkups

Consult on spaying/neutering timing: Reduces the risk of pyometra and prostate disease

If hematuria recurs, keep a record of any recent changes in food, treats, or medications—this can be very helpful during veterinary visits.

A puppy drinking fresh water from a water fountain.

Reviewed by a veterinarian

Dr. Tony — Punnawat Phongkittirak

Veterinarian

A veterinarian who majored in veterinary medicine at Khon Kaen University, Thailand, and completed the IVSA program at North Carolina State University in the United States. Drawing on clinical experience at animal hospitals, he works in the pet healthcare field and is dedicated to building a digital care environment that connects pet parents with veterinarians.

Frequently Asked Questions

My pet had pink urine just once, and it’s been normal since. Should I still go to the vet?

Yes, I recommend it. Even with isolated hematuria, stones or early-stage tumors can cause intermittent bleeding. Whenever possible, take a photo of the urine and have a urinalysis done within 48 hours for safety.

Could the change in diet to one containing beets and carrots be the cause?

Beets and food coloring can turn some dogs' urine pink. However, since color alone makes it difficult to distinguish from true hematuria, a urinalysis to check for red blood cells is the most accurate method.

I’ve been giving my pet antibiotics, but the blood in the urine hasn’t gone away. Should we switch to a stronger medication?

Changing or increasing antibiotics on your own can be dangerous. If there’s no response after 1–2 weeks of antibiotic treatment, it could indicate bladder stones, tumors, or antibiotic-resistant bacteria, so further diagnostic tests such as a urine culture, ultrasound, and possibly a CT scan may be necessary.

My senior dog keeps having recurrent hematuria. Is it likely to be a tumor?

In senior dogs, if antibiotic responses are only temporary and symptoms keep recurring, it’s important to consider transitional cell carcinoma of the bladder and urethra. An ultrasound can help check for masses in the trigone area of the bladder, and a urine cytology or biopsy can accurately identify tumor cells.

Will encouraging my pet to drink more water at home help if I notice blood in their urine?

While hydration is helpful, it is not a standalone treatment. If your pet has a urinary obstruction, forcing excessive water intake can increase the risk of bladder rupture. Please first confirm whether your pet is urinating normally, and then prioritize scheduling a veterinary appointment.

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References

[1] Clinical Medicine of the Dog and Cat, 4th Edition - Chapter on Hematuria and Pigmenturia

[2] The Veterinary Workbook of Small Animal Clinical Cases - Case 18 Hematuria

[3] BSAVA Manual of Canine and Feline Nephrology and Urology, 3rd Edition